Common Weakness Enumeration
CWE-347
AllowedImproper Verification of Cryptographic Signature
Abstraction: Base · Status: Draft
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
688 vulnerabilities reference this CWE, most recent first.
CVE-2026-97799 (GCVE-0-2026-97799)
Vulnerability from cvelistv5 – Published: 2026-10-13 19:01 – Updated: 2026-10-31 18:12
VLAI
EPSS
VEX
Title
Windows Audio Service Elevation of Privilege Vulnerability
Summary
Improper verification of cryptographic signature in Windows Audio Service allows an authorized attacker to elevate privileges locally.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 21:58 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Windows 11 Version 24H2 |
Affected:
10.0.26100.0 , < 10.0.26100.9711
(custom)
|
|
| Microsoft | Windows 11 Version 25H2 |
Affected:
10.0.26200.0 , < 10.0.26200.9711
(custom)
|
|
| Microsoft | Windows 11 version 26H1 |
Affected:
10.0.28000.0 , < 10.0.28000.3231
(custom)
|
|
| Microsoft | Windows 11 Version 26H2 |
Affected:
10.0.26300.0 , < 10.0.26300.9711
(custom)
|
Date Public
2026-10-13 14:00
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CVE-2026-97732 (GCVE-0-2026-97732)
Vulnerability from cvelistv5 – Published: 2026-09-25 03:29 – Updated: 2026-09-25 13:43
VLAI
EPSS
VEX
Summary
IRONMACE Ironshield 1.0.0.167 has a tvk.sys kernel-mode driver that authenticates client executables by checking for expected publisher and root-certificate strings in WIN_CERTIFICATE data ("IRONMACE Co., Ltd." and "DigiCert Trusted Root G4") instead of parsing and validating the PKCS signature data. As a result, a local unprivileged attacker may bypass this via crafted certificate data and obtain access to privileged IOCTL functionality.
Severity
5.1 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 13:42 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
mitre
CNA
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| IRONMACE | Ironshield |
Affected:
1.0.0.167
(custom)
|
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CVE-2026-97731 (GCVE-0-2026-97731)
Vulnerability from cvelistv5 – Published: 2026-09-25 03:07 – Updated: 2026-09-25 15:22
VLAI
EPSS
VEX
Summary
MinIO through 7aac2a2 does not verify that every x-amz-* header present on a request also appears in the client-supplied X-Amz-SignedHeaders list. extractSignedHeaders() in cmd/signature-v4-utils.go iterates only the claimed list and never enumerates the headers that actually arrived, and thus a header that arrives unsigned is neither hashed into the canonical request nor rejected. Because cmd/api-router.go dispatches CopyObject on the presence of x-amz-copy-source alone, the holder of a presigned PUT URL scoped to a single object can add that header to the unmodified URL and cause a server-side copy, executed as the signer, of any object the signing key can read. A grant to write one object becomes a read of every bucket that key can reach. Amazon S3 rejects the equivalent request with HTTP 403 AccessDenied. The minio/minio GitHub repository was archived in April 2026; pgsty/silo before 1233254 is also affected.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 15:22 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
mitre
CNA
References
Impacted products
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CVE-2026-96957 (GCVE-0-2026-96957)
Vulnerability from cvelistv5 – Published: 2026-10-13 19:01 – Updated: 2026-10-31 18:11
VLAI
EPSS
VEX
Title
.NET Security Feature Bypass Vulnerability
Summary
Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 00:00 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | .NET 10.0 runtime |
Affected:
10.0.0 , < 10.0.402
(custom)
|
|
| Microsoft | .NET 11.0 runtime |
Affected:
11.0.0 , < 11.0.100-rc.2
(custom)
|
|
| Microsoft | Microsoft Visual Studio 2022 version 17.14 |
Affected:
17.14.0 , < 17.14.42
(custom)
|
|
| Microsoft | Microsoft Visual Studio 2026 version 18.10 |
Affected:
18.10.0 , < 18.10.4
(custom)
|
Date Public
2026-10-13 14:00
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CVE-2026-96252 (GCVE-0-2026-96252)
Vulnerability from cvelistv5 – Published: 2026-10-13 19:01 – Updated: 2026-10-31 18:11
VLAI
EPSS
VEX
Title
Active Directory Federation Services (AD FS) Spoofing Vulnerability
Summary
Improper verification of cryptographic signature in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 00:00 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
microsoft
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
13 products
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 |
Affected:
10.0.14393.0 , < 10.0.14393.9612
(custom)
|
|
| Microsoft | Windows 10 Version 1809 |
Affected:
10.0.17763.0 , < 10.0.17763.9376
(custom)
|
|
| Microsoft | Windows Server 2012 |
Affected:
6.2.9200.0 , < 6.2.9200.26434
(custom)
|
|
| Microsoft | Windows Server 2012 (Server Core installation) |
Affected:
6.2.9200.0 , < 6.2.9200.26434
(custom)
|
|
| Microsoft | Windows Server 2012 R2 |
Affected:
6.3.9600.0 , < 6.3.9600.23470
(custom)
|
|
| Microsoft | Windows Server 2012 R2 (Server Core installation) |
Affected:
6.3.9600.0 , < 6.3.9600.23470
(custom)
|
|
| Microsoft | Windows Server 2016 |
Affected:
10.0.14393.0 , < 10.0.14393.9612
(custom)
|
|
| Microsoft | Windows Server 2016 (Server Core installation) |
Affected:
10.0.14393.0 , < 10.0.14393.9612
(custom)
|
|
| Microsoft | Windows Server 2019 |
Affected:
10.0.17763.0 , < 10.0.17763.9376
(custom)
|
|
| Microsoft | Windows Server 2019 (Server Core installation) |
Affected:
10.0.17763.0 , < 10.0.17763.9376
(custom)
|
|
| Microsoft | Windows Server 2022 |
Affected:
10.0.20348.0 , < 10.0.20348.5761
(custom)
|
|
| Microsoft | Windows Server 2025 |
Affected:
10.0.26100.0 , < 10.0.26100.33650
(custom)
|
|
| Microsoft | Windows Server 2025 (Server Core installation) |
Affected:
10.0.26100.0 , < 10.0.26100.33650
(custom)
|
Date Public
2026-10-13 14:00
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CVE-2026-95633 (GCVE-0-2026-95633)
Vulnerability from cvelistv5 – Published: 2026-10-13 21:27 – Updated: 2026-10-17 00:52
VLAI
EPSS
VEX
Title
CAI Content Credentials | Improper Verification of Cryptographic Signature (CWE-347)
Summary
CAI Content Credentials is affected by an Improper Verification of Cryptographic Signature vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized write access. Exploitation of this issue does not require user interaction.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-17 00:52 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature (CWE-347)
Assigner
adobe
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://www.adobe.com/trust/security/products/con… | vendor-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Content Credentials Rust SDK |
Affected:
0 , ≤ c2pa-v0.90.15
(custom)
Unaffected: c2pa-v0.91.1 (custom) |
|
| Adobe | C2PA Tool |
Affected:
0 , ≤ c2patool-v0.27.15
(custom)
Unaffected: v0.28.1 (custom) |
|
| Adobe | Content Credentials JS SDK |
Affected:
0 , ≤ @contentauth/c2pa-web@0.13.4
(custom)
Unaffected: @contentauth/c2pa-web@0.15.3 (custom) |
Date Public
2026-10-13 17:00
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CVE-2026-95632 (GCVE-0-2026-95632)
Vulnerability from cvelistv5 – Published: 2026-10-13 21:27 – Updated: 2026-10-14 18:27
VLAI
EPSS
VEX
Title
CAI Content Credentials | Improper Verification of Cryptographic Signature (CWE-347)
Summary
CAI Content Credentials is affected by an Improper Verification of Cryptographic Signature vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to bypass security measures and gain unauthorized write access. Exploitation of this issue does not require user interaction.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-14 18:27 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature (CWE-347)
Assigner
adobe
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://www.adobe.com/trust/security/products/con… | vendor-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Adobe | Content Credentials Rust SDK |
Affected:
0 , ≤ c2pa-v0.90.15
(custom)
Unaffected: c2pa-v0.91.1 (custom) |
|
| Adobe | C2PA Tool |
Affected:
0 , ≤ c2patool-v0.27.15
(custom)
Unaffected: v0.28.1 (custom) |
|
| Adobe | Content Credentials JS SDK |
Affected:
0 , ≤ @contentauth/c2pa-web@0.13.4
(custom)
Unaffected: @contentauth/c2pa-web@0.15.3 (custom) |
Date Public
2026-10-13 17:00
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CVE-2026-95503 (GCVE-0-2026-95503)
Vulnerability from cvelistv5 – Published: 2026-09-22 07:43 – Updated: 2026-11-06 10:27
VLAI
EPSS
VEX
Title
Keycloak-services: keycloak-services: potential kdc spoofing bypass when kerberos password authentication is enabled
Summary
A flaw was found in the Kerberos federation provider of Keycloak, an open-source identity and access management solution. When Kerberos password authentication is used without SPNEGO, the system fails to verify the identity of the Key Distribution Center (KDC) by requesting a server ticket. This allows an attacker on the same network to spoof the KDC and bypass the authentication process, potentially gaining unauthorized access to user accounts.
Severity
6.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 14:35 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
redhat
CNA
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:95761 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-95503 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2537744 | issue-trackingx_refsource_REDHAT |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.6.8 |
cpe:/a:redhat:build_keycloak:26.6::el9
|
|
| Red Hat | Red Hat Single Sign-On 7 |
cpe:/a:redhat:red_hat_single_sign_on:7
|
Date Public
2026-09-22 07:23
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CVE-2026-94418 (GCVE-0-2026-94418)
Vulnerability from cvelistv5 – Published: 2026-09-27 08:58 – Updated: 2026-09-29 16:45
VLAI
EPSS
VEX
Title
Signature failure masked by date error under WOLFSSL_SMALL_CERT_VERIFY
Summary
Under WOLFSSL_SMALL_CERT_VERIFY, ProcessPeerCertParse() runs the certificate signature check separately from the parse to keep peak memory down, then merges the two results, but it merged the signature result back only when the parse returned 0, so any parse error hid it. ParseCertRelative() reaches its validity-date, name-constraint and critical-extension checks only after ConfirmSignature() has passed, so splitting the signature check out inverts the precedence that makes "override date errors" a sound policy, and ASN_SIG_CONFIRM_E is never surfaced anywhere. The attacker needs no key material from the real PKI and no CA compromise: a self-made certificate carrying the expected subject name, the trusted CA's subject as its issuer, arbitrary bytes where the signature goes, a validity window in the past and the attacker's own key pair is sufficient. Affected builds define WOLFSSL_SMALL_CERT_VERIFY, which is off by default, is not set implicitly by any platform or preset header, and is not reachable from any CMake option; the autotools routes are --enable-lowresource, --enable-leantls, --enable-tinytls13=cert and --enable-tinytls13=mutualauth, and examples/configs/user_settings_embedded.h reaches it through WC_CFG_SMALL_CERT_VERIFY, which ships as 0, while neither --enable-all nor --enable-distro enables it at all. The application must additionally install a verify callback through wolfSSL_CTX_set_verify() or wolfSSL_set_verify() with WOLFSSL_VERIFY_PEER that returns 1 for ASN_BEFORE_DATE_E or ASN_AFTER_DATE_E; wolfSSL ships this exact shape as myVerify() in wolfssl/test.h under VERIFY_OVERRIDE_DATE_ERR, which examples/client -D selects. An application with no callback, or whose callback returns preverify for date errors, still fails the handshake, and wolfSSL_CertManagerVerifyBuffer() and wc_CheckCertSignature() report ASN_SIG_CONFIRM_E correctly in the same binary. TLS 1.2 and TLS 1.3 are affected in both directions, and DTLS reaches the same function; where the forged certificate is a chain certificate the callback's consent causes it to be cached in the WOLFSSL_CTX certificate manager, so an exposed deployment must restart the context or the process rather than merely reconnect.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 16:44 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
wolfSSL
CNA
References
1 reference
Impacted products
Date Public
2026-09-26 12:00
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CVE-2026-94368 (GCVE-0-2026-94368)
Vulnerability from cvelistv5 – Published: 2026-09-21 11:45 – Updated: 2026-09-25 06:45
VLAI
EPSS
VEX
Title
Noobaa-core: noobaa-core: presigned put url escalation to copyobject via unsigned x-amz-copy-source header
Summary
A flaw was found in the signature verification logic of noobaa-core, the core component of the NooBaa Multicloud Object Gateway. The issue occurs when the service processes S3 presigned URLs using Signature Version 4 (SigV4). Due to improper validation, the service fails to reject requests containing unsigned x-amz- headers, instead simply dropping them from the signature calculation. This allows an attacker who possesses a valid presigned PUT URL to add an unsigned x-amz-copy-source header, effectively converting a simple upload into a CopyObject operation. This can lead to unauthorized access and copying of any data the original signer is permitted to reach across the entire storage system.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 19:40 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
redhat
CNA
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-94368 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2537364 | issue-trackingx_refsource_REDHAT |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Openshift Data Foundation 4 |
cpe:/a:redhat:openshift_data_foundation:4
|
Date Public
2026-09-21 11:00
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"value": "A flaw was found in the signature verification logic of noobaa-core, the core component of the NooBaa Multicloud Object Gateway. The issue occurs when the service processes S3 presigned URLs using Signature Version 4 (SigV4). Due to improper validation, the service fails to reject requests containing unsigned x-amz- headers, instead simply dropping them from the signature calculation. This allows an attacker who possesses a valid presigned PUT URL to add an unsigned x-amz-copy-source header, effectively converting a simple upload into a CopyObject operation. This can lead to unauthorized access and copying of any data the original signer is permitted to reach across the entire storage system."
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"description": "Improper Verification of Cryptographic Signature",
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"time": "2026-09-09T10:49:16.000Z",
"value": "Reported to Red Hat."
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"time": "2026-09-21T11:00:00.000Z",
"value": "Made public."
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"title": "Noobaa-core: noobaa-core: presigned put url escalation to copyobject via unsigned x-amz-copy-source header",
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"value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."
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"datePublished": "2026-09-21T11:45:12.776Z",
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No mitigation information available for this CWE.
CAPEC-463: Padding Oracle Crypto Attack
An adversary is able to efficiently decrypt data without knowing the decryption key if a target system leaks data on whether or not a padding error happened while decrypting the ciphertext. A target system that leaks this type of information becomes the padding oracle and an adversary is able to make use of that oracle to efficiently decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). In addition to performing decryption, an adversary is also able to produce valid ciphertexts (i.e., perform encryption) by using the padding oracle, all without knowing the encryption key.
CAPEC-475: Signature Spoofing by Improper Validation
An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.