CVE-2026-39373
MEDIUM5.3EPSS 0.10%JWCrypto: JWE ZIP decompression bomb
發布日:2026/4/8修改日:2026/5/21
描述
JWCrypto implements JWK, JWS, and JWE specifications using python-cryptography. Prior to 1.5.7, an unauthenticated attacker can exhaust server memory by sending crafted JWE tokens with ZIP compression. The existing patch for CVE-2024-28102 limits input token size to 250KB but does not validate the decompressed output size. An unauthenticated attacker can cause memory exhaustion on memory-constrained systems. A token under the 250KB input limit can decompress to approximately 100MB. This vulnerability is fixed in 1.5.7.
受影響套件(3)
- Debian/python-jwcryptofrom 0
- PyPI/jwcryptofrom 0, <= 1.5.6
- PyPI/jwcryptofrom 0, < 1.5.7
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |