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vuln-cve/data/2026/40xxx/CVE-2026-40935.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-40935",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-04-15T20:40:15.518Z",
"datePublished": "2026-04-21T22:21:17.009Z",
"dateUpdated": "2026-04-22T18:36:10.405Z"
},
"containers": {
"cna": {
"title": "WWBN/AVideo has CAPTCHA Bypass via Attacker-Controlled Length Parameter and Missing Token Invalidation on Failure",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-804",
"lang": "en",
"description": "CWE-804: Guessable CAPTCHA",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/WWBN/AVideo/security/advisories/GHSA-hg7g-56h5-5pqr",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-hg7g-56h5-5pqr"
},
{
"name": "https://github.com/WWBN/AVideo/commit/bf1c76989e6a9054be4f0eb009d68f0f2464b453",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/WWBN/AVideo/commit/bf1c76989e6a9054be4f0eb009d68f0f2464b453"
}
],
"affected": [
{
"vendor": "WWBN",
"product": "AVideo",
"versions": [
{
"version": "<= 29.0",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-04-21T22:21:17.009Z"
},
"descriptions": [
{
"lang": "en",
"value": "WWBN AVideo is an open source video platform. In versions 29.0 and prior, `objects/getCaptcha.php` accepts the CAPTCHA length (`ql`) directly from the query string with no clamping or sanitization, letting any unauthenticated client force the server to generate a 1-character CAPTCHA word. Combined with a case-insensitive `strcasecmp` comparison over a ~33-character alphabet and the fact that failed validations do NOT consume the stored session token, an attacker can trivially brute-force the CAPTCHA on any endpoint that relies on `Captcha::validation()` (user registration, password recovery, contact form, etc.) in at most ~33 requests per session. Commit bf1c76989e6a9054be4f0eb009d68f0f2464b453 contains a fix."
}
],
"source": {
"advisory": "GHSA-hg7g-56h5-5pqr",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"references": [
{
"url": "https://github.com/WWBN/AVideo/security/advisories/GHSA-hg7g-56h5-5pqr",
"tags": [
"exploit"
]
}
],
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-04-22T18:34:39.128005Z",
"id": "CVE-2026-40935",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-04-22T18:36:10.405Z"
}
}
]
}
}