OPENSUSE-SU-2026:21827-1

Vulnerability from csaf_opensuse - Published: 2026-09-10 09:38 - Updated: 2026-09-17 17:44
Summary
Security update for python-jwcrypto
Severity
Moderate
Notes
Title of the patch: Security update for python-jwcrypto
Description of the patch: This update for python-jwcrypto fixes the following issues: - CVE-2026-80179: denial of service via malformed JWE tokens (bsc#1277639). - CVE-2026-84185: general JSON JWS kid binding bypass during JWKSet verification (bsc#1278707).
Patchnames: openSUSE-Leap-16.0-1655
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
CVE-2026-80179
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
Product Identifier Version Remediation
Unresolved product id: openSUSE Leap 16.0:python313-jwcrypto-0:1.5.6-160000.4.1.noarch —
Vendor Fix
Threats
Impact moderate
CVE-2026-84185
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N
Affected products
Recommended 1 product, the same list as for CVE-2026-80179
Threats
Impact moderate
References
To clipboard 

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          "text": "A flaw was found in jwcrypto. A remote attacker can send a specially crafted JSON Web Encryption (JWE) token containing numerous period delimiters. This malformed token can force the JWE.deserialize() function to allocate excessive memory, leading to a MemoryError. This issue results in a denial of service (DoS) for services that process untrusted JWE values.",
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          "text": "A flaw was found in the jwcrypto library, which is used for implementing Javascript Object Signing and Encryption (JOSE) standards. The issue occurs when the library verifies a General JSON Serialization JWS using a set of keys. Due to a coding error, the library fails to correctly identify the specific key ID (kid) and may instead accept a signature made by any valid key in the set. This can allow an attacker with a valid key to bypass authorization checks in applications that rely on the key ID to identify specific tenants or users.",
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}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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