CVE-2026-100909
Status: DeferredMedium (5.5)—
A vulnerability was found in OctoberCMS up to 4.1.19/4.2.25/4.3.4. The impacted element is the function getSourcePathForResize of the file modules/system/classes/ResizeImages.php. The manipulation of the argument realSourcePath results in server-side request forgery. The attack may be performed from remote. The exploit has been made public and could be used. Upgrading to version 4.3.5 and 4.4.0 is sufficient to resolve this issue. The patch is identified as 0e9736aa2c6d6bd3d60ff6ef9e0b4d32ce387f58. The affected component should be upgraded.
CVSS
- Version: 4.0
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Base score: 5.5
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 0.30%
- Percentile among all scored CVEs: 21
- Score date: 10/6/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
🎯 ATT&CK techniques
How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.
- Exploitation
T1190Exploit Public-Facing Applicationinitial access90 % - Primary impact
T1090Proxycommand and control85 % - Secondary impact
T1005Data from Local Systemcollection60 %
CWE-918 (SSRF) en aplicación expuesta accesible remotamente sin autenticación. Vector AV:N/PR:N permite T1190. El atacante manipula realSourcePath para redirigir requests (T1090) y potencialmente acceder a recursos internos (T1005).
Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.
🛡️ ATT&CK mitigations that cover these techniques
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
CWEs
- CWE-918
References
- https://github.com/0xGenesi/CVE/blob/main/October_CMS_Stream_Wrapper_Injection.md
- https://github.com/octobercms/october/commit/0e9736aa2c6d6bd3d60ff6ef9e0b4d32ce387f58
- https://github.com/octobercms/october/releases/tag/v4.3.5
- https://github.com/octobercms/october/security/advisories/GHSA-2xmm-m4wv-3fjh
- https://vuldb.com/cve/CVE-2026-100909
- https://vuldb.com/submit/919993
- https://vuldb.com/vuln/410869
- https://vuldb.com/vuln/410869/cti
Raw JSON (NVD)
Show
{
"id": "CVE-2026-100909",
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"metrics": {
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"integrityRequirement": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
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"vulnerabilityResponseEffort": "NOT_DEFINED",
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"vendor": "n/a",
"product": "OctoberCMS",
"versions": [
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"published": "2026-09-28T05:16:30.067",
"references": [
{
"url": "https://github.com/0xGenesi/CVE/blob/main/October_CMS_Stream_Wrapper_Injection.md",
"source": "cna@vuldb.com"
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{
"url": "https://github.com/octobercms/october/commit/0e9736aa2c6d6bd3d60ff6ef9e0b4d32ce387f58",
"source": "cna@vuldb.com"
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{
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"source": "cna@vuldb.com"
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{
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"source": "cna@vuldb.com"
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{
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"source": "cna@vuldb.com"
},
{
"url": "https://vuldb.com/submit/919993",
"source": "cna@vuldb.com"
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{
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"source": "cna@vuldb.com"
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{
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"vulnStatus": "Deferred",
"weaknesses": [
{
"type": "Secondary",
"source": "cna@vuldb.com",
"description": [
{
"lang": "en",
"value": "CWE-918"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was found in OctoberCMS up to 4.1.19/4.2.25/4.3.4. The impacted element is the function getSourcePathForResize of the file modules/system/classes/ResizeImages.php. The manipulation of the argument realSourcePath results in server-side request forgery. The attack may be performed from remote. The exploit has been made public and could be used. Upgrading to version 4.3.5 and 4.4.0 is sufficient to resolve this issue. The patch is identified as 0e9736aa2c6d6bd3d60ff6ef9e0b4d32ce387f58. The affected component should be upgraded."
}
],
"lastModified": "2026-09-28T15:16:04.793",
"sourceIdentifier": "cna@vuldb.com"
}