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VulnerabilityPublished

CVE-2026-29179: octobercms october · Incorrect Authorization

Affects octobercms octoberSource CVE Database V5

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Not known to be exploited · CVSS 3.3 Low : upgrade to 4.1.16 or 3.7.16 when convenient.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 3.1 base score
3.3Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.1.16, 3.7.16
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade october to 4.1.16 or 3.7.16; octobercms/october to 3.7.16.

Affected software

ProductAffectedFixed in
octobercmsoctoberAffected
  • >=4.0.0 <4.1.16
Fixed in
  • 4.1.16
octobercmsoctoberAffected
  • <3.7.16
Fixed in
  • 3.7.16
GitHuboctobercms/octoberpkg:github/octobercms/octoberOther threatsAffected
  • <3.7.16
Fixed in
  • 3.7.16

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in October CMS versions 3.7.16 and 4.1.16. Users should upgrade to these or later versions to remediate the vulnerability. Since this is a software vulnerability, patching is the recommended mitigation. No vendor advisory content is provided to indicate alternative mitigations or that no action is required.

Description

October is a Content Management System (CMS) and web platform. Prior to 3.7.16 and 4.1.16, fine-grained sub-permission checks for asset and blueprint file operations were not enforced in the CMS and Tailor editor extensions. This only affects backend users who were explicitly granted editor access but had editor.cms_assets or editor.tailor_blueprints specifically withheld, an uncommon permission configuration. In this edge case, such users could perform file operations (create, delete, rename, move, upload) on theme assets or blueprint files despite lacking the required sub-permission. A related operator precedence error in the Tailor navigation also disclosed the theme blueprint directory tree under the same conditions. This vulnerability is fixed in 3.7.16 and 4.1.16.

References

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