Description

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.

INFO

Published Date :

2026-04-07T19:35:36.071Z

Last Modified :

2026-04-07T20:22:57.790Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-39373 vulnerability.

Vendors Products
Latchset
  • Jwcrypto
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-39373.

URL Resource
https://github.com/latchset/jwcrypto/security/advisories/GHSA-fjrm-76x2-c4q4 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-39373 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-39373 cve-icon
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CVSS Vulnerability Scoring System

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