CVE-2026-48526

Publication date 28 May 2026

Last updated 28 September 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.4 · High

Score breakdown

Description

PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorithm, allowing attacker to use the issuer public key as the secret key for HMAC algorithm. This vulnerability is fixed in 2.13.0.

Status

Package Ubuntu Release Status
pyjwt 26.04 LTS resolute
Fixed 2.10.1-4ubuntu1.1
25.10 questing Ignored end of life, was needs-triage
24.04 LTS noble
Fixed 2.7.0-1ubuntu0.2
22.04 LTS jammy
Fixed 2.3.0-1ubuntu0.4
20.04 LTS focal
Fixed 1.7.1-2ubuntu2.1+esm2
18.04 LTS bionic
Fixed 1.5.3+ds1-1ubuntu0.1+esm2
16.04 LTS xenial
Fixed 1.3.0-1ubuntu0.1+esm2

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
pyjwt

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.4 · High

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-8823-1
    • PyJWT vulnerabilities
    • 25 September 2026

Other references

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