TYPO3 CMS - Insecure Deserialization in Core API
Summary
| CVE | CVE-2026-49740 |
|---|---|
| State | PUBLISHED |
| Assigner | TYPO3 |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-06-09 11:16:53 UTC |
| Updated | 2026-06-09 13:46:50 UTC |
| Description | 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, 11.0.0-11.5.51, 12.0.0-12.4.46, 13.0.0-13.4.31 and 14.0.0-14.3.3. |
Risk And Classification
Primary CVSS: v4.0 6.3 MEDIUM from f4fb688c-4412-4426-b4b8-421ecf27b14a
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
EPSS: 0.002460000 probability, percentile 0.481320000 (date 2026-06-09)
Problem Types: CWE-502 | CWE-502 CWE-502 Deserialization of Untrusted Data
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | f4fb688c-4412-4426-b4b8-421ecf27b14a | Secondary | 6.3 | MEDIUM | 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/C... |
| 4.0 | CNA | CVSS | 6.3 | MEDIUM | 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 |
CVSS v4.0 Breakdown
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
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | TYPO3 | TYPO3 CMS | affected 10.4.57 semver | Not specified |
| CNA | TYPO3 | TYPO3 CMS | affected 11.0.0 11.5.51 semver | Not specified |
| CNA | TYPO3 | TYPO3 CMS | affected 12.0.0 12.4.46 semver | Not specified |
| CNA | TYPO3 | TYPO3 CMS | affected 13.0.0 13.4.31 semver | Not specified |
| CNA | TYPO3 | TYPO3 CMS | affected 14.0.0 14.3.3 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/TYPO3/typo3/commit/87cd7c5b710c44d3606fed277b040a75dc6a9c02 | f4fb688c-4412-4426-b4b8-421ecf27b14a | github.com | |
| typo3.org/security/advisory/typo3-core-sa-2026-018 | f4fb688c-4412-4426-b4b8-421ecf27b14a | typo3.org | |
| github.com/TYPO3/typo3/commit/48bcf24f31f52cc0b43d3bea4984634bd2cf85c7 | f4fb688c-4412-4426-b4b8-421ecf27b14a | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: z3rco (en)
CNA: Chowdhury Faizal Ahammed (en)
CNA: Rick Larabee (en)
CNA: Vitaly Simonovich (en)
CNA: Nozomu Sasaki (en)
CNA: Mert Akdag (en)
CNA: tikket (en)
CNA: Shafi Almutairi (en)
CNA: Oliver Hader (en)