DEBIAN-CVE-2026-39373
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-39373
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-39373.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-39373
- Upstream
- Published
- 2026-04-07T20:16:32.133Z
- Modified
- 2026-04-28T20:32:54.079101Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Debian:11 / python-jwcrypto
Package
- Name
- python-jwcrypto
- Purl
- pkg:deb/debian/python-jwcrypto?arch=source
Debian:12 / python-jwcrypto
Package
- Name
- python-jwcrypto
- Purl
- pkg:deb/debian/python-jwcrypto?arch=source
Debian:13 / python-jwcrypto
Package
- Name
- python-jwcrypto
- Purl
- pkg:deb/debian/python-jwcrypto?arch=source
Debian:14 / python-jwcrypto
Package
- Name
- python-jwcrypto
- Purl
- pkg:deb/debian/python-jwcrypto?arch=source