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CVE-2026-39373

JWCrypto: JWE ZIP decompression bomb PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
latchset / jwcryptoaffected < 1.5.7

CWE

CWE-409

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.