JWCrypto: python-cryptography: python: JWCrypto: Memory exhaustion via crafted compressed JWE tokens

A flaw was found in JWCrypto, a Python library for JSON Web Key JWK, JSON Web Signature JWS, and JSON Web Encryption JWE specifications. An unauthenticated attacker can exploit this vulnerability by sending specially crafted JWE tokens that use ZIP compression. While the input token size is...

ROS-20260506-73-0001

A vulnerability in the Jwcrypto JavaScript cryptography library is associated with uncontrolled resource consumption. Exploitation of the vulnerability could allow a remote attacker to perform a brute force attack and cause a denial-of-service condition...

Amazon Linux 2023 : python3-jwcrypto (ALAS2023-2026-1590)

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1590 advisory. 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...

GHSA-FJRM-76X2-C4Q4 JWCrypto: JWE ZIP decompression bomb

Summary The fix for GHSA-j857-7rvv-vj97 in v1.5.6 is weak in that it does not allow to fully control the amount of plaintext the receiver is willing to deal with and provides just a weak upper bound. The patch limits input token size to 250KB but does not validate the decompressed output size. An...

Improper Handling of Highly Compressed Data (Data Amplification)

Overview Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data Data Amplification through the JWE decompression that has no upper limit for plaintext size. An attacker can exhaust system memory by sending specially crafted compressed tokens that decompres...

CVE-2026-39373

A flaw was found in JWCrypto, a Python library for JSON Web Key JWK, JSON Web Signature JWS, and JSON Web Encryption JWE specifications. An unauthenticated attacker can exploit this vulnerability by sending specially crafted JWE tokens that use ZIP compression. While the input token size is...