OESA-2026-1923

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-1923
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-1923.json
JSON Data
https://api.test.osv.dev/v1/vulns/OESA-2026-1923
Upstream
Published
2026-04-17T13:00:26Z
Modified
2026-04-17T13:19:57.901141Z
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:24.03-LTS-SP2 / python-jwcrypto

Package

Name
python-jwcrypto
Purl
pkg:rpm/openEuler/python-jwcrypto&distro=openEuler-24.03-LTS-SP2

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.5.0-4.oe2403sp2

Ecosystem specific 

{
    "src": [
        "python-jwcrypto-1.5.0-4.oe2403sp2.src.rpm"
    ],
    "noarch": [
        "python-jwcrypto-help-1.5.0-4.oe2403sp2.noarch.rpm",
        "python3-jwcrypto-1.5.0-4.oe2403sp2.noarch.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-1923.json"