Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The jose4j package (Maven org.bitbucket.b_c:jose4j) before 0.9.4 is vulnerable to denial of service through a JWE with a very large PBES2 count (p2c) value, which can consume excessive CPU. An attacker who can submit crafted JWE input to an affected application can exhaust processing resources. Upgrade to jose4j 0.9.4 or later.
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 |
|---|---|---|---|---|
| 6.5 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0087, the 59th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:18 UTC First seen by agentprime
- 31 Oct 2026, 14:18 UTC Confirmed by OSV