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.
689 vulnerabilities reference this CWE, most recent first.
CVE-2026-77805 (GCVE-0-2026-77805)
Vulnerability from cvelistv5 – Published: 2026-10-05 12:40 – Updated: 2026-10-05 15:26
VLAI
EPSS
VEX
Title
Weak Executable Signature Verification Vulnerability in Progress® Telerik® Fiddler® Classic
Summary
In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, the integrity check applied to the external helper tools launched by the application is insufficient. Before executing a helper tool, the application only verifies that the file carries a valid Authenticode signature whose certificate subject name matches a broad allow list of publisher name fragments, rather than verifying that the file is the specific executable shipped with that version of the product. A local threat actor with low privileges who replaces one of these helper executables with any other validly signed binary from an allow-listed publisher can cause the substituted binary to be executed by the application, including with Administrator privileges for the tools that request elevation, resulting in privilege escalation and execution of unintended code. Successful exploitation requires the user to launch the affected external tool and to approve the elevation prompt without noticing that it refers to a different executable.
Severity
7.9 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-05 15:25 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
ProgressSoftware
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://docs.telerik.com/fiddler/knowledge-base/k… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Progress Software | Progress® Telerik® Fiddler® Classic |
Affected:
1.0.0 , < 6.0.20262.10021
(custom)
|
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CVE-2026-76581 (GCVE-0-2026-76581)
Vulnerability from cvelistv5 – Published: 2026-08-28 06:39 – Updated: 2026-08-28 15:24
VLAI
EPSS
VEX
Title
WPMU DEV Dashboard <= 5.0.1 - Authentication Bypass to Administrator via SSO HMAC Canonicalization Confusion
Summary
The WPMU DEV Dashboard plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 5.0.1. This is due to inconsistent and ambiguous HMAC message construction between the unauthenticated `wdpsso_step1` and `wdpsso_step2` AJAX actions, where step 1 signs and discloses an unseparated concatenation of the token, state, redirect, and domain values, while step 2 verifies an unseparated concatenation that omits the domain field. This makes it possible for unauthenticated attackers, on sites connected to WPMU DEV with Hub SSO enabled and mapped to an administrator, to obtain a valid HMAC from step 1 and replay it to step 2 by moving the domain value into the redirect field, resulting in an authenticated administrator session.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-28 15:24 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
Wordfence
CNA
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| wpmudev | WPMU DEV Dashboard |
Affected:
0 , ≤ 5.0.1
(semver)
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CVE-2026-76482 (GCVE-0-2026-76482)
Vulnerability from cvelistv5 – Published: 2026-10-07 16:16 – Updated: 2026-11-07 17:29
VLAI
EPSS
VEX
CVE Program bundle warning
The CVE Program recognizes that this CVE Record provides vulnerability information that a Supplier CNA believes is very important to consumers. The CVE Program has flagged this CVE Record as it assigns a single CVE ID to a collection of individual vulnerabilities which does not align with CVE's "one vulnerability, one ID" principle, and therefore provides incomplete information. For further clarification, please see the CVE Program's blog, "Preserving Vulnerability-Level Identification" linked below. Details within the CNA container below are viewable by clicking on the CNA name.
https://www.cve.org/Media/News/item/blog/2026/06/…Title
Cisco License On-Prem Security Hardening Release
Summary
As part of Cisco's ongoing commitment to proactive security and product quality, the engineering team for Cisco License On-Prem, formerly Cisco Smart Software Manager On-Prem (SSM On-Prem), has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-76482 are related to issues with improper input verification that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-347.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 00:00 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
cisco
CNA
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco License On-Prem |
Affected:
7-202001
Affected: 1.1 Affected: 6.3.0 Affected: 8-202004 Affected: 8-202006 Affected: 1.2 Affected: 1.3 Affected: 8-202012 Affected: 8-202010 Affected: 8-202008 Affected: 9-202201 Affected: 8-202102 Affected: 1.4 Affected: 8-202105 Affected: 8-202108 Affected: 8-202112 Affected: 8-202201 Affected: 8-202206 Affected: 8-202212 Affected: 8-202302 Affected: 8-202303 Affected: 8-202304 Affected: 8-202308 Affected: 8-202401 Affected: 8-202404 Affected: 9-202406 Affected: 9-202407 Affected: 9-202410 Affected: 9-202412 Affected: 9-202501 Affected: 9-202502 Affected: 9-202504 Affected: 9-202507 Affected: 9-202510 Affected: 9-202601 Affected: 10-202606 Affected: 10-202608 |
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CVE-2026-76234 (GCVE-0-2026-76234)
Vulnerability from cvelistv5 – Published: 2026-08-19 14:02 – Updated: 2026-08-21 11:21
VLAI
EPSS
VEX
Title
libcrux before 0.0.6 Cryptographic Implementation Bug Fixes
Summary
libcrux-ecdh and libcrux-ed25519 before 0.0.6, and libcrux-psq before 0.0.7, contain cryptographic implementation bugs. libcrux-ecdh did not properly check length and clamping during X25519 secret validation (and had a broken clamping check for imported X25519 secret keys); libcrux-ed25519 performed a duplicated clamping step during key generation; and libcrux-psq panicked instead of propagating an AEADError. These were fixed in the respective patched releases.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 13:48 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/celabshq/libcrux/security/advi… | vendor-advisory |
| https://www.vulncheck.com/advisories/libcrux-befo… | third-party-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| celabshq | libcrux-ecdh |
Affected:
0 , < 0.0.6
(semver)
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|
| celabshq | libcrux-ed25519 |
Affected:
0 , < 0.0.6
(semver)
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|
| celabshq | libcrux-psq |
Affected:
0 , < 0.0.7
(semver)
Unaffected: 0.0.7 (semver) |
Date Public
2026-02-12 00:00
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CVE-2026-75946 (GCVE-0-2026-75946)
Vulnerability from cvelistv5 – Published: 2026-08-21 13:50 – Updated: 2026-08-31 18:34
VLAI
EPSS
VEX
Title
OMEN Gaming Hub – Potential Escalation of Privilege & Information Disclosure
Summary
A potential security vulnerability has been identified in the OMEN Gaming Hub for versions prior to 1101.2608.0.0. The vulnerability could potentially allow a local attacker to escalate privileges due to insufficient access controls.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 15:07 UTC
CWE
- CWE-347 - Improper verification of cryptographic signature
Assigner
hp
CNA
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| HP Inc | OMEN Gaming Hub |
Affected:
0 , < <1101.2608.0.0
(custom)
|
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CVE-2026-75939 (GCVE-0-2026-75939)
Vulnerability from cvelistv5 – Published: 2026-09-21 14:05 – Updated: 2026-11-06 22:43
VLAI
EPSS
VEX
Title
Openshift/oc-mirror: release signature verification: openpgp signatureerror checked before signed body is consumed
Summary
A flaw was found in openshift/oc-mirror. The tool incorrectly verifies PGP (Pretty Good Privacy) release image signatures by checking for signature errors before the entire signed body is processed, leading to a bypass of the signature verification. A remote attacker, by intercepting or manipulating network traffic to the signature endpoint, could exploit this to craft a PGP message with a valid Red Hat release key ID but a forged signature. This enables the `oc-mirror` tool to accept and mirror a malicious release payload into a disconnected registry, potentially compromising the integrity of software deployments.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-24 13:26 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
redhat
CNA
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:79039 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-75939 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2517976 | issue-trackingx_refsource_REDHAT |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat OpenShift Container Platform 4.18 |
Unaffected:
1790828598 , < *
(rpm)
cpe:/a:redhat:openshift:4.18::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
|
| Red Hat | Red Hat OpenShift Container Platform 5 |
cpe:/a:redhat:openshift:5
|
Date Public
2026-09-21 13:27
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CVE-2026-75759 (GCVE-0-2026-75759)
Vulnerability from cvelistv5 – Published: 2026-08-30 01:12 – Updated: 2026-08-31 14:53
VLAI
EPSS
VEX
Title
Encrypted ID token or JARM response accepted without a nested signature in erlef oidcc
Summary
Improper Verification of Cryptographic Signature vulnerability in erlef oidcc allows an unauthenticated attacker to impersonate an arbitrary user via an encrypted ID token or JARM response carrying no nested signature. OpenID Connect Core 1.0 section 2 requires that an encrypted ID token be signed then encrypted, with the result being a Nested JWT, and JARM processing rule 5 requires the client to check the signature unconditionally. oidcc instead accepted a JWE wrapping unsigned claims as fully validated, so anyone holding the relying party's public encryption key could mint a token with an arbitrary sub, iss, and aud without possessing the provider's signing key.
In oidcc_jwt_util:verify_decrypted_token/4, a decrypted payload that is not a signed JWS fell back to parsing the plaintext claims and returning them with no verifying key. oidcc_token:int_validate_jwt/4 then matched on the JOSE structure type rather than on whether a signature had been verified, and returned success. The JARM path in oidcc_token:validate_jarm/3 is reachable through the browser front channel. UserInfo responses are not affected, because OpenID Connect Core 1.0 section 5.3.2 permits them to be encrypted without also being signed.
This issue affects oidcc: from 3.2.0-beta.1 before 3.9.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 14:53 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
EEF
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/erlef/oidcc/security/advisorie… | relatedvendor-advisory |
| https://cna.erlef.org/cves/CVE-2026-75759.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-75759 | related |
| https://github.com/erlef/oidcc/commit/5f62fbccdae… | patch |
Impacted products
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CVE-2026-74901 (GCVE-0-2026-74901)
Vulnerability from cvelistv5 – Published: 2026-08-17 11:04 – Updated: 2026-10-01 15:21
VLAI
EPSS
VEX
Title
openssl_encrypt before 1.4.0 Authentication Bypass via AES-CTR Fallback
Summary
openssl_encrypt versions before 1.4.0 contain an authentication bypass vulnerability in pqc.py where AES-GCM decryption failures trigger fallback to unauthenticated AES-CTR mode. Attackers can modify ciphertext in transit to bypass integrity verification and perform bit-flipping attacks without detection.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 16:00 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/jahlives/openssl_encrypt/secur… | vendor-advisory |
| https://www.vulncheck.com/advisories/openssl-encr… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| jahlives | openssl_encrypt |
Affected:
0 , < 1.4.0
(semver)
Unaffected: 1.4.0 (semver) cpe:2.3:a:jahlives:openssl_encrypt:*:*:*:*:*:*:*:* |
Date Public
2026-02-10 00:00
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CVE-2026-74876 (GCVE-0-2026-74876)
Vulnerability from cvelistv5 – Published: 2026-08-17 11:04 – Updated: 2026-10-08 15:24
VLAI
EPSS
VEX
Title
openssl_encrypt before 1.4.0 Unverified Key Bundle Encryption
Summary
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Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 15:41 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/jahlives/openssl_encrypt/secur… | vendor-advisory |
| https://www.vulncheck.com/advisories/openssl-encr… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| jahlives | openssl_encrypt |
Affected:
0 , < 1.4.0
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Unaffected: 1.4.0 (semver) cpe:2.3:a:jahlives:openssl_encrypt:*:*:*:*:*:*:*:* |
Date Public
2026-02-10 00:00
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CVE-2026-74244 (GCVE-0-2026-74244)
Vulnerability from cvelistv5 – Published: 2026-08-14 22:43 – Updated: 2026-08-17 18:02
VLAI
EPSS
VEX
Title
Quay: stripe webhook accepts forged events without signature verification in quay
Summary
A flaw was found in Red Hat Quay's Stripe billing webhook handler. This vulnerability allows an unauthenticated attacker to forge billing events by sending crafted JSON requests to the `/webhooks/stripe` endpoint without validating the Stripe-Signature header. Successful exploitation can lead to the unauthorized resetting of a namespace's build quota to its maximum and trigger unsolicited billing emails to namespace administrators.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 18:02 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
redhat
CNA
References
2 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-74244 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2516143 | issue-trackingx_refsource_REDHAT |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat OpenShift Update Service |
cpe:/a:redhat:openshift_update_service:5
|
|
| Red Hat | Red Hat Quay 3 |
cpe:/a:redhat:quay:3
|
Date Public
2026-08-14 00:00
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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.