CVE-2026-49740 json
TYPO3 CMS - Insecure Deserialization in Core API
published 2026-06-09 5 mo ago modified 2026-09-10 1 mo ago also GHSA-c78m-c52x-jgwp , EUVD-2026-35401
- cvss
- 6.3
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 11%
- public exploits
- 0
- none known
Summary
TYPO3's cache frontend (VariableFrontend) and persistent key-value store (Registry) deserialized PHP payloads without integrity validation or class restrictions. An attacker with write access to the underlying storage backend (cache store or sys_registry database table) could inject a crafted serialized payload to trigger PHP Object Injection, potentially exploiting a gadget chain to achieve Remote Code Execution or other high-impact effects. Exploiting this vulnerability requires direct local write access to the storage, such as the SQL database or file system. This issue affects TYPO3 CMS versions before 10.4.57, 11.0.0-11.5.50, 12.0.0-12.4.45, 13.0.0-13.4.30 and 14.0.0-14.3.2.
Patch / fix
- packagist typo3/cms-core 10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3
- TYPO3 TYPO3 CMS 10.4.57, 11.5.51, 12.4.46, 13.4.31, 14.3.3
- github.com/TYPO3/typo3@48bcf24 commit
- github.com/TYPO3/typo3@87cd7c5 commit
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.3 | 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 | 4.0 | 6.3 | 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/E:X/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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | typo3/cms-core | <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 |
Affected products
- TYPO3 TYPO3 CMS
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
github.com
/TYPO3/typo3/commit/48bcf24f31f52cc0b43d3bea4984634bd2cf85c7
patch, web
-
github.com
/TYPO3/typo3/commit/87cd7c5b710c44d3606fed277b040a75dc6a9c02
patch, web
-
typo3.org
/security/advisory/typo3-core-sa-2026-018
vendor-advisory, web
-
github.com
/TYPO3/typo3/security/advisories/GHSA-c78m-c52x-jgwp
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-49740
advisory
-
github.com
/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2026-49740.yaml
web
-
github.com
/TYPO3/typo3
package
Sources
- CVE List CVE-2026-49740
- GitHub Advisory GHSA-c78m-c52x-jgwp
- NVD CVE-2026-49740
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