CVE catalog
CVE-2026-84185
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 Serializat
- Severity
- Medium · CVSS 5.9
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.13% · Oct 27, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | python-jwcrypto | sid | 1.5.6-1.2 | vulnerable |
| Debian | python-jwcrypto | forky | 1.5.6-1.2 | vulnerable |
| Debian | python-jwcrypto | trixie | 1.5.6-1.1~deb13u1 | vulnerable |
| Debian | python-jwcrypto | bookworm | 1.1.0-1+deb12u1 | not affected |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | python-jwcrypto | source | sid | (unfixed) | not yet assigned | Not reported | [1146875] |
| Debian | python-jwcrypto | source | forky | (unfixed) | not yet assigned | Not reported | [1146875] |
| Debian | python-jwcrypto | source | trixie | (unfixed) | not yet assigned | Not reported | [1146875] |
| Debian | python-jwcrypto | source | bookworm | Not affected | unimportant | Not reported | [1146875] |
Notes
[trixie] python-jwcrypto: Minor issue
OpenFactory catalog packages
[Debian 13 (Trixie)]
- [python3-jwcrypto]Affected
Source package: [python-jwcrypto]
Details (2)
1.5.6-1.1~deb13u1· all · trixieAffected
nvd · python-jwcrypto · debian · 13
1.5.6-1.1~deb13u1· all · trixieAffected
nvd · python-jwcrypto · debian · 13
[Debian 12 (Bookworm)]
- [python3-jwcrypto]Not affected
Source package: [python-jwcrypto]
Details (2)
1.1.0-1+deb12u1· all · bookwormNot affected
nvd · python-jwcrypto · debian · bookworm
1.1.0-1+deb12u1· all · bookwormNot affected
nvd · python-jwcrypto · debian · bookworm
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11712-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-84185]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-84185]
- [https://security-tracker.debian.org/tracker/CVE-2026-84185]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84185.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]