Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Versions of io.jooby:jooby-pac4j before 2.17.0, and from 3.0.0.M1 before 3.7.0, are vulnerable to deserialization of untrusted data through session handling. The source describes an attacker supplying a crafted session value, which can lead to code execution; the exact conditions required are not fully detailed. Upgrade to 2.17.0 or 3.7.0. As a workaround, check which values are stored in the session and avoid putting untrusted data there.
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 |
|---|---|---|---|---|
| 8.8 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0066, the 52nd percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:11 UTC First seen by agentprime
- 31 Oct 2026, 15:11 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-7c5v-895v-w4q5
- OSV: GHSA-7c5v-895v-w4q5
- github.com/jooby-project/jooby/security/advisories/GHSA-7c5v-895v-w4q5
- nvd.nist.gov/vuln/detail/CVE-2025-31129
- github.com/jooby-project/jooby/commit/3e13562cf36d7407813eae464e0f4b598de15692
- github.com/jooby-project/jooby
- github.com/jooby-project/jooby/blob/v2.x/modules/jooby-pac4j/src/main/java/io/jooby/internal/pac4j/SessionStoreImpl.java#L39-L45
- github.com/jooby-project/jooby/blob/v3.6.1/modules/jooby-pac4j/src/main/java/io/jooby/internal/pac4j/SessionStoreImpl.java#L77-L84