{"id":"CVE-2026-54517","aliases":["GHSA-5hh8-q8hv-fr38"],"url":"https://o3.security/vulnerability/CVE-2026-54517","summary":"jackson-databind: @JsonView bypass for setterless creator properties","details":"## Summary\nIn `BeanDeserializer._deserializeUsingPropertyBased`, the active-view (`@JsonView`) filter was applied only to creator properties; the regular property-buffering branch performed no `prop.visibleInView(activeView)` check. A change making `SetterlessProperty.isMerging()` return `true` routed setterless Collection/Map properties through this unguarded path, so a setterless collection annotated with a restricted `@JsonView` is populated from attacker JSON even when the active view excludes it.\n\n## Impact\nView-restricted (e.g. admin-only) setterless collection/map properties can be written from untrusted JSON despite `@JsonView` gating — an access-control / mass-assignment bypass. No RCE or DoS.\n\n## Affected / Patched (verified via `git tag --contains`)\n- 2.21 line: `>= 2.21.0, < 2.21.4` -> fixed in **2.21.4** (backport `94c5d21`, #5970)\n- 3.x line: `>= 3.0.0, < 3.1.4` -> fixed in **3.1.4** (#5969, `5bf23ed`)\n\n## Severity / CWE\nMaintainer: minor. Reporter: HIGH. CWE-863 (Incorrect Authorization); related CWE-1220.\n\n## Credits\nOmkhar Arasaratnam (@omkhar) - finder.","published":"2026-06-23T20:47:22.977Z","modified":"2026-10-21T10:18:15.499541841Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},"epss":{"score":0.00384,"percentile":0.32163,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"com.fasterxml.jackson.core:jackson-databind","fixedVersion":"2.21.4"},{"ecosystem":"Maven","name":"com.fasterxml.jackson.core:jackson-databind","fixedVersion":"3.1.4"},{"ecosystem":"Maven","name":"tools.jackson.core:jackson-databind","fixedVersion":"3.1.4"}],"fix":{"url":"https://github.com/FasterXML/jackson-databind/commit/5bf23edb4221f7dd2ec8e71ff6d26c61640f261d","label":"FasterXML/jackson-databind@5bf23ed"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54517.json"},{"type":"ADVISORY","url":"https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-5hh8-q8hv-fr38"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54517"},{"type":"FIX","url":"https://github.com/FasterXML/jackson-databind/commit/5bf23edb4221f7dd2ec8e71ff6d26c61640f261d"},{"type":"FIX","url":"https://github.com/FasterXML/jackson-databind/commit/94c5d215b3af1505098c686405d9641f041a9962"},{"type":"FIX","url":"https://github.com/FasterXML/jackson-databind/pull/5969"},{"type":"FIX","url":"https://github.com/FasterXML/jackson-databind/pull/5970"},{"type":"PACKAGE","url":"https://github.com/FasterXML/jackson-databind"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T10:18:15.499541841Z"}}