CVE catalog

CVE-2026-48526

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

[CVE catalog]

Severity
High · CVSS 7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
Source
[NVD] · [CVE record]
EPSS
0.43% · Oct 27, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

DistributionPackageReleaseVersionStatus
Debianpyjwtsid2.15.1-1fixed
Debianpyjwtforky2.15.1-1fixed
Debianpyjwttrixie2.10.1-2+deb13u1vulnerable
Debianpyjwttrixie-security2.10.1-2+deb13u1vulnerable
Debianpyjwtbookworm2.6.0-1+deb12u1vulnerable
Debianpyjwtbookworm-security2.6.0-1+deb12u1vulnerable
CpepyjwtNot reportedNot reportedvulnerable
CpepyjwtNot reported2.13.0fixed
PyPIpyjwtNot reported2.13.0fixed
CpepyjwtNot reported2.13.0fixed
Ubuntupyjwtnoble2.7.0-1ubuntu0.2fixed
Ubuntupython3-jwtnoble2.7.0-1ubuntu0.2fixed
Ubuntupyjwtpro1.7.0-2vulnerable
Ubuntupyjwtpro1.7.1-1vulnerable
Ubuntupyjwtpro1.7.1-2ubuntu1vulnerable
Ubuntupyjwtpro1.7.1-2ubuntu2vulnerable
Ubuntupyjwtpro1.7.1-2ubuntu2.1vulnerable
Ubuntupyjwtpro1.7.1-2ubuntu2.1+esm1vulnerable
Ubuntupyjwtpro1.7.1-2ubuntu2.1+esm2fixed
Ubuntupyjwt22.041.7.1-2ubuntu2vulnerable
Ubuntupyjwt22.042.1.0-1vulnerable
Ubuntupyjwt22.042.3.0-1vulnerable
Ubuntupyjwt22.042.3.0-1ubuntu0.1vulnerable
Ubuntupyjwt22.042.3.0-1ubuntu0.2vulnerable
Ubuntupyjwt22.042.3.0-1ubuntu0.3vulnerable
Ubuntupyjwt22.042.3.0-1ubuntu0.4fixed
Ubuntupyjwt24.042.7.0-1vulnerable
Ubuntupyjwt24.042.7.0-1ubuntu0.1vulnerable
Ubuntupyjwt24.042.7.0-1ubuntu0.2fixed
Ubuntupyjwt25.102.10.1-2vulnerable
Ubuntupyjwt25.102.10.1-2ubuntu0.1vulnerable
Ubuntupyjwt26.042.10.1-2vulnerable
Ubuntupyjwt26.042.10.1-3vulnerable
Ubuntupyjwt26.042.10.1-3build1vulnerable
Ubuntupyjwt26.042.10.1-4vulnerable
Ubuntupyjwt26.042.10.1-4ubuntu1vulnerable
Ubuntupyjwt26.042.10.1-4ubuntu1.1fixed

Fixed-version evidence

DistributionPackageTypeReleaseFixed versionUrgencyOriginBugs
Debianpyjwtsourcesid2.13.0-1not yet assignedNot reported[1138191]
Debianpyjwtsourceforky2.13.0-1not yet assignedNot reported[1138191]
Debianpyjwtsourcetrixie(unfixed)not yet assignedNot reported[1138191]
Debianpyjwtsourcebookworm(unfixed)not yet assignedNot reported[1138191]
CpepyjwtcpeNot reported2.13.0Not reportedNot reportedNot reported
PyPIpyjwtPyPINot reported2.13.0Not reportedNot reportedNot reported
CpepyjwtcpeNot reported2.13.0Not reportedNVD-CVE-2026-48526Not reported
Ubuntupyjwtdebnoble2.7.0-1ubuntu0.2Not reportedNot reportedNot reported
Ubuntupython3-jwtdebnoble2.7.0-1ubuntu0.2Not reportedNot reportedNot reported
Ubuntupyjwtdebpro1.7.1-2ubuntu2.1+esm2Not reportedUBUNTU-CVE-2026-48526Not reported
Ubuntupyjwtdeb22.042.3.0-1ubuntu0.4Not reportedUBUNTU-CVE-2026-48526Not reported
Ubuntupyjwtdeb24.042.7.0-1ubuntu0.2Not reportedUBUNTU-CVE-2026-48526Not reported
Ubuntupyjwtdeb26.042.10.1-4ubuntu1.1Not reportedUBUNTU-CVE-2026-48526Not reported

[Debian bug #1138191]

Notes

[trixie] pyjwt: Minor issue [bookworm] pyjwt: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

  • [python3-jwt]Affected

    Source package: [pyjwt]

    Details (4)

    • 2.6.0-1+deb12u1 · all · bookworm

      Affected

      nvd · pyjwt · debian · bookworm; nvd · pyjwt · debian · 12

    • 2.6.0-1+deb12u1 · all · bookworm

      Affected

      nvd · pyjwt · debian · bookworm; nvd · pyjwt · debian · 12

    • 2.6.0-1+deb12u1 · all · bookworm-security

      Affected

      nvd · pyjwt · debian · bookworm; nvd · pyjwt · debian · 12

    • 2.6.0-1+deb12u1 · all · bookworm-security

      Affected

      nvd · pyjwt · debian · bookworm; nvd · pyjwt · debian · 12

[Debian 13 (Trixie)]

  • [python3-jwt]Affected

    Source package: [pyjwt]

    Details (4)

    • 2.10.1-2+deb13u1 · all · trixie

      Affected

      nvd · pyjwt · debian · 13

    • 2.10.1-2+deb13u1 · all · trixie

      Affected

      nvd · pyjwt · debian · 13

    • 2.10.1-2+deb13u1 · all · trixie-security

      Affected

      nvd · pyjwt · debian · 13

    • 2.10.1-2+deb13u1 · all · trixie-security

      Affected

      nvd · pyjwt · debian · 13

  • [python-jwt-doc]Affected

    Source package: [pyjwt]

    Details (4)

    • 2.10.1-2+deb13u1 · all · trixie

      Affected

      nvd · pyjwt · debian · 13

    • 2.10.1-2+deb13u1 · all · trixie

      Affected

      nvd · pyjwt · debian · 13

    • 2.10.1-2+deb13u1 · all · trixie-security

      Affected

      nvd · pyjwt · debian · 13

    • 2.10.1-2+deb13u1 · all · trixie-security

      Affected

      nvd · pyjwt · debian · 13

Observed:

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]