Auth bypass in Api-platform Api-platform/hal
CVE-2026-49858
API Platform Core is a system to create hypermedia-driven REST and GraphQL APIs. In versions from 2.6.0 prior to 4.1.29, 4.2.26, and 4.3.12, a missing isCacheKeySafe gate in the JSON:API and HAL item normalizers causes a cross-user attribu…
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Api-platform Api-platform/hal — versions >= 2.6.0, < 4.1.29, >= 4.2.0, < 4.2.25, >= 4.3.0, < 4.3.8
- Api-platform Api-platform/json-api — versions >= 2.6.0, < 4.1.29, >= 4.2.0, < 4.2.25, >= 4.3.0, < 4.3.8
- Api-platform Core — versions >= 2.6.0, < 4.1.29, >= 4.2.0, < 4.2.25, >= 4.3.0, < 4.3.8
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-49858?
- CVE-2026-49858 is a medium-severity vulnerability in Api-platform Api-platform/hal, classified under Use of Cache Containing Sensitive Information. CVSS score: 5.9/10. Published 2026-07-01.
- How severe is CVE-2026-49858?
- Medium severity. CVSS v3 base score is 5.9 out of 10.