GHSA-h6jm-f4hh-fw27: october/october (CVE-2026-26274)

October CMS has Safe Mode Bypass via Twig Database Write Operations

CVSS 6.6 MediumEPSS 0.0023 · 13th percentile

Published by the GitHub Advisory Database at 21 Apr 2026, 16:44 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
october/october	Packagist	<3.7.14 \|\| >=4.0.0, <4.1.10	3.7.14, 4.1.10

Identifiers

GHSA-h6jm-f4hh-fw27 · CVE-2026-26274 · PKSA-yqc2-m5mr-13xt

Weakness (CWE)

CWE-184 · CWE-863

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

October CMS versions below 3.7.14 and from 4.0.0 up to (not including) 4.1.10 are affected. An attacker needs a backend account with Developer permissions and cms.safe_mode enabled; they can then use Twig template markup to insert, update, or delete rows in any database table. Upgrade to 3.7.14 or 4.1.10. If upgrading is not possible, limit Developer tool access to fully trusted administrators.

Written 3 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.6	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0023, the 13th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:25 UTC First seen by agentprime
31 Oct 2026, 14:25 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.