CVE-2026-102266: pyjwt vulnerabilities
Affects pyjwtSource GCVE Database
Mentioned vulnerabilities
Not known to be exploited · CVSS 7.4 High · fixed in 1.3.0-1ubuntu0.1+esm3 : patch pyjwt soon.
Data as of 27 Oct 2026, 16:13 UTC
- Patch
- Available – fixed in 1.3.0-1ubuntu0.1+esm3, 1.5.3+ds1-1ubuntu0.1+esm3, 1.7.1-2ubuntu2.1+esm3 +3
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 28 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Patches and advisories
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSpyjwtpkg:deb/ubuntu/pyjwt?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 24.04 LTSpyjwtpkg:deb/ubuntu/pyjwt?arch=source&distro=nobleOther threats | Affected
| Fixed in
|
Ubuntu 22.04 LTSpyjwtpkg:deb/ubuntu/pyjwt?arch=source&distro=jammyOther threats | Affected
| Fixed in
|
Ubuntu Pro 20.04 LTSpyjwtpkg:deb/ubuntu/pyjwt?arch=source&distro=esm-infra/focalOther threats | Affected
| Fixed in
|
Ubuntu Pro 18.04 LTSpyjwtpkg:deb/ubuntu/pyjwt?arch=source&distro=esm-infra/bionicOther threats | Affected
| Fixed in
|
Ubuntu Pro 16.04 LTSpyjwtpkg:deb/ubuntu/pyjwt?arch=source&distro=esm-infra-legacy/xenialOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available. Users should update PyJWT to the fixed package versions provided by Ubuntu for their respective LTS releases. Standard system updates or applying Ubuntu Pro fixes will remediate these vulnerabilities. Refer to the Ubuntu security notice USN-8916-1 for detailed update instructions.
Description
Multiple vulnerabilities were discovered in PyJWT affecting various Ubuntu LTS releases. These issues involve improper validation and handling of JWK keys, PEM representations, DER public keys, and redirects when fetching key sets. Exploitation could allow attackers to forge authentication tokens or cause sensitive information disclosure. The vulnerabilities affect Ubuntu 16.04 through 26.04 LTS versions. Fixes have been released in updated package versions for all affected Ubuntu releases.
References
- ubuntu.com/security/notices/USN-8916-1 (opens in a new tab)
- ubuntu.com/security/CVE-2026-102266 (opens in a new tab)
- ubuntu.com/security/CVE-2026-102267 (opens in a new tab)
- ubuntu.com/security/CVE-2026-102268 (opens in a new tab)
- ubuntu.com/security/CVE-2026-102271 (opens in a new tab)
- ubuntu.com/security/CVE-2026-102272 (opens in a new tab)
- ubuntu.com/security/CVE-2026-102273 (opens in a new tab)