High7.5Vendor: LowRed Hat Linux

High [CVE-2026-39373] Memory exhaustion via crafted compressed JWE tokens

This high-severity Red Hat Linux advisory covers CVE-2026-39373 affecting Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 1.

CVE-2026-39373 Published Apr 7, 2026

CVE-2026-39373

Affected products & platforms

Red Hat LinuxUnclassified

Open vendor advisory

Android app · Google Play

Monitor future Red Hat Linux CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.

Matching phone alertsOptional email delivery

Get CVE alerts See app features

Summary

Memory exhaustion via crafted compressed JWE tokens. Red Hat rates this low (CVSS 7.5).

Weakness: CWE-770. Affected package(s): python3.12-jwcrypto, python-jwcrypto.

Resolved in Red Hat advisory RHSA-2026:13508 — update the affected packages (`sudo dnf update`).

Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1.

Affected versions

python3.12-jwcrypto-0:1.5.7-1.el8ap
python3.12-jwcrypto-0:1.5.7-1.el9ap
python-jwcrypto-0:1.5.6-5.el10_2
python-jwcrypto-0:1.5.6-3.el9_8

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

RHSA-2026:13508

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update the affected package(s) to the fixed version shipped in RHSA-2026:13508 (`sudo dnf update` / `yum update`).

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.