CVE-2026-93955 (GCVE-0-2026-93955)
Vulnerability from cvelistv5
Published
2026-09-19 22:15
Modified
2026-09-21 20:20
Severity ?
2.1 (Low) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RC:R
4.3 (Medium) - CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RC:R
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RC:R
4.3 (Medium) - CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RC:R
VLAI Severity ?
EPSS score ?
Summary
A vulnerability was detected in grimmory-tools grimmory up to 3.3.3/3.4.1. Affected by this vulnerability is the function streamFileToResponse of the file backend/src/main/java/org/booklore/controller/KoboController.java of the component Download Endpoint. Performing a manipulation of the argument bookId results in authorization bypass. The attack may be initiated remotely. The exploit is now public and may be used. Issue #2431 is closed as completed, but its only comment states that the issue “has already been reported elsewhere.” No fixing commit or pull request is identified there.
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| grimmory-tools | grimmory |
Version: 3.3.0 Version: 3.3.1 Version: 3.3.2 Version: 3.3.3 Version: 3.4.0 Version: 3.4.1 cpe:2.3:a:grimmory-tools:grimmory:*:*:*:*:*:*:*:* |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-93955",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-21T20:12:51.031460Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-09-21T20:20:23.567Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://github.com/grimmory-tools/grimmory/issues/2431#issuecomment-5384402858"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:grimmory-tools:grimmory:*:*:*:*:*:*:*:*"
],
"modules": [
"Download Endpoint"
],
"product": "grimmory",
"vendor": "grimmory-tools",
"versions": [
{
"status": "affected",
"version": "3.3.0"
},
{
"status": "affected",
"version": "3.3.1"
},
{
"status": "affected",
"version": "3.3.2"
},
{
"status": "affected",
"version": "3.3.3"
},
{
"status": "affected",
"version": "3.4.0"
},
{
"status": "affected",
"version": "3.4.1"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "summmm (VulDB User)"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulDB CNA Team"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was detected in grimmory-tools grimmory up to 3.3.3/3.4.1. Affected by this vulnerability is the function streamFileToResponse of the file backend/src/main/java/org/booklore/controller/KoboController.java of the component Download Endpoint. Performing a manipulation of the argument bookId results in authorization bypass. The attack may be initiated remotely. The exploit is now public and may be used. Issue #2431 is closed as completed, but its only comment states that the issue \u201chas already been reported elsewhere.\u201d No fixing commit or pull request is identified there."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 4,
"vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N/E:POC/RL:ND/RC:C",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-639",
"description": "Authorization Bypass",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-285",
"description": "Improper Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-19T22:15:09.092Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-407914 | grimmory-tools grimmory Download Endpoint KoboController.java streamFileToResponse authorization",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/vuln/407914"
},
{
"name": "VDB-407914 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/407914/cti"
},
{
"name": "CVE-2026-93955 | CVE Analysis and Report",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/cve/CVE-2026-93955"
},
{
"name": "Submit #943921 | grimmory-tools grimmory 3.3.3 Incorrect Access Control",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/943921"
},
{
"tags": [
"exploit",
"issue-tracking"
],
"url": "https://github.com/grimmory-tools/grimmory/issues/2431"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/grimmory-tools/grimmory/issues/2431#issuecomment-5384402858"
},
{
"tags": [
"product"
],
"url": "https://github.com/grimmory-tools/grimmory/"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-09-19T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-09-19T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-09-19T10:56:27.000Z",
"value": "VulDB entry last update"
}
],
"title": "grimmory-tools grimmory Download Endpoint KoboController.java streamFileToResponse authorization",
"x_generator": [
"VulDB PVTS v202609"
]
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-93955",
"datePublished": "2026-09-19T22:15:09.092Z",
"dateReserved": "2026-09-19T08:51:16.505Z",
"dateUpdated": "2026-09-21T20:20:23.567Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-93955\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-21T20:12:51.031460Z\"}}}], \"references\": [{\"url\": \"https://github.com/grimmory-tools/grimmory/issues/2431#issuecomment-5384402858\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-21T20:12:56.815Z\"}}], \"cna\": {\"title\": \"grimmory-tools grimmory Download Endpoint KoboController.java streamFileToResponse authorization\", \"credits\": [{\"lang\": \"en\", \"type\": \"reporter\", \"value\": \"summmm (VulDB User)\"}, {\"lang\": \"en\", \"type\": \"coordinator\", \"value\": \"VulDB CNA Team\"}], \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 5.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P\"}}, {\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 4.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R\"}}, {\"cvssV3_0\": {\"version\": \"3.0\", \"baseScore\": 4.3, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R\"}}, {\"cvssV2_0\": {\"version\": \"2.0\", \"baseScore\": 4, \"vectorString\": \"AV:N/AC:L/Au:S/C:P/I:N/A:N/E:POC/RL:ND/RC:C\"}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:grimmory-tools:grimmory:*:*:*:*:*:*:*:*\"], \"vendor\": \"grimmory-tools\", \"modules\": [\"Download Endpoint\"], \"product\": \"grimmory\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.3.0\"}, {\"status\": \"affected\", \"version\": \"3.3.1\"}, {\"status\": \"affected\", \"version\": \"3.3.2\"}, {\"status\": \"affected\", \"version\": \"3.3.3\"}, {\"status\": \"affected\", \"version\": \"3.4.0\"}, {\"status\": \"affected\", \"version\": \"3.4.1\"}]}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-09-19T00:00:00.000Z\", \"value\": \"Advisory disclosed\"}, {\"lang\": \"en\", \"time\": \"2026-09-19T02:00:00.000Z\", \"value\": \"VulDB entry created\"}, {\"lang\": \"en\", \"time\": \"2026-09-19T10:56:27.000Z\", \"value\": \"VulDB entry last update\"}], \"references\": [{\"url\": \"https://vuldb.com/vuln/407914\", \"name\": \"VDB-407914 | grimmory-tools grimmory Download Endpoint KoboController.java streamFileToResponse authorization\", \"tags\": [\"vdb-entry\", \"technical-description\"]}, {\"url\": \"https://vuldb.com/vuln/407914/cti\", \"name\": \"VDB-407914 | CTI Indicators (IOB, IOC, IOA)\", \"tags\": [\"signature\", \"permissions-required\"]}, {\"url\": \"https://vuldb.com/cve/CVE-2026-93955\", \"name\": \"CVE-2026-93955 | CVE Analysis and Report\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://vuldb.com/submit/943921\", \"name\": \"Submit #943921 | grimmory-tools grimmory 3.3.3 Incorrect Access Control\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://github.com/grimmory-tools/grimmory/issues/2431\", \"tags\": [\"exploit\", \"issue-tracking\"]}, {\"url\": \"https://github.com/grimmory-tools/grimmory/issues/2431#issuecomment-5384402858\", \"tags\": [\"issue-tracking\"]}, {\"url\": \"https://github.com/grimmory-tools/grimmory/\", \"tags\": [\"product\"]}], \"x_generator\": [\"VulDB PVTS v202609\"], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability was detected in grimmory-tools grimmory up to 3.3.3/3.4.1. Affected by this vulnerability is the function streamFileToResponse of the file backend/src/main/java/org/booklore/controller/KoboController.java of the component Download Endpoint. Performing a manipulation of the argument bookId results in authorization bypass. The attack may be initiated remotely. The exploit is now public and may be used. Issue #2431 is closed as completed, but its only comment states that the issue \\u201chas already been reported elsewhere.\\u201d No fixing commit or pull request is identified there.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-639\", \"description\": \"Authorization Bypass\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-285\", \"description\": \"Improper Authorization\"}]}], \"providerMetadata\": {\"orgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"shortName\": \"VulDB\", \"dateUpdated\": \"2026-09-19T22:15:09.092Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-93955\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-21T20:20:23.567Z\", \"dateReserved\": \"2026-09-19T08:51:16.505Z\", \"assignerOrgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"datePublished\": \"2026-09-19T22:15:09.092Z\", \"assignerShortName\": \"VulDB\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…