OESA-2026-3636

See a problem?
Please try reporting it to the source first.

Source

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-3636

Import Source

https://repo.openeuler.org/security/data/osv/OESA-2026-3636.json

JSON Data

https://api.test.osv.dev/v1/vulns/OESA-2026-3636

Upstream

CVE-2026-39373

Published

2026-09-05T15:03:22Z

Modified

2026-09-05T15:16:35Z

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

python-jwcrypto security update

Details

Implements JWK, JWS, JWE specifications with python-cryptography

Security Fix(es):

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.(CVE-2026-39373)

Database specific

{
    "severity": "Medium"
}

References

Affected packages

openEuler:22.03-LTS-SP4 / python-jwcrypto

Package

Name: python-jwcrypto
Purl: pkg:rpm/openEuler/python-jwcrypto&distro=openEuler-22.03-LTS-SP4

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.4.2-4.oe2203sp4

Ecosystem specific

{
    "noarch": [
        "python3-jwcrypto-1.4.2-4.oe2203sp4.noarch.rpm"
    ],
    "src": [
        "python-jwcrypto-1.4.2-4.oe2203sp4.src.rpm"
    ]
}

Database specific

source

"https://repo.openeuler.org/security/data/osv/OESA-2026-3636.json"