Description
In jose4j before 0.9.6, an attacker can cause a Denial-of-Service (DoS) condition by crafting a malicious JSON Web Encryption (JWE) token with an exceptionally high compression ratio. When this token is processed by the server, it results in significant memory allocation and processing time during decompression.
Affected products
jose4j_project: jose4j
References2
- bitbucket.org/b_c/jose4j/issues/220/vuln-zip-bomb-attack ExploitIssue TrackingMitigation
- bitbucket.org/b_c/jose4j/issues/220/vuln-zip-bomb-attack ExploitIssue TrackingMitigation
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 17 · as of 11 November 2026
- CWE
- CWE-1259
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.