GHSA-c78m-c52x-jgwp: typo3/cms-core (CVE-2026-49740)

Package	Ecosystem	Affected	Fixed in
typo3/cms-core	Packagist	<10.4.57 \|\| >=11.0.0, <11.5.51 \|\| >=12.0.0, <12.4.46 \|\| >=13.0.0, <13.4.31 \|\| >=14.0.0, <14.3.3	10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3

Machine-written summary

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

TYPO3 CMS core (typo3/cms-core) versions below 10.4.57, from 11.0.0 before 11.5.51, from 12.0.0 before 12.4.46, from 13.0.0 before 13.4.31, and from 14.0.0 before 14.3.3 are affected. The cache frontend and persistent registry deserialize PHP data without integrity checks or class restrictions, so an attacker with direct write access to the cache store or the database (or file system) can inject a crafted payload to trigger PHP object injection, which may lead to remote code execution. Upgrade to 10.4.57, 11.5.51, 12.4.46, 13.4.31, or 14.3.3 or later.

Written 31 Oct 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
6.3	Medium	4.0	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H	CNA (TYPO3)

CISA KEV Not listed.
EPSS 0.0022, the 12th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 13:57 UTC First seen by agentprime
31 Oct 2026, 13:57 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.