CVE-2026-103001
MEDIUMDescription
PyJWT is a Python implementation of JSON Web Token standards. From 2.11.0 through 2.13.0, PyJWT's PyJWT._merge_options() method can modify a caller-supplied mutable options mapping when verify_signature is false. If an application reuses that same mapping for a later decode() or decode_complete() call and changes verify_signature to true, the mapping can retain false values for expiration, not-before, issued-at, audience, issuer, subject, and JWT ID checks. A signed token with invalid registered claims can then be accepted without disabling signature verification, but applications that create a fresh options mapping for each call are not affected.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N/E:U
Exploit Intelligence
Low risk: more likely to be exploited than 14% of all known CVEs.
References
Related Vulnerabilities
Other CWE-471 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2022-21824 | High | 8.2 | 22% | - | Fix |
| CVE-2018-3728 | High | 8.8 | 4.2% | - | Fix |
| CVE-2020-8147 | Critical | 9.8 | 3.1% | - | - |
| CVE-2020-8116 | High | 7.3 | 3.1% | - | Fix |
| CVE-2018-3721 | Medium | 6.5 | 2.4% | - | Fix |
| CVE-2020-26245 | High | 8.1 | 2.2% | - | Fix |
Common questions
How do I fix CVE-2026-103001?
Upgrade pyjwt on debian unstable to 2.14.0-1 or later.
Is CVE-2026-103001 being actively exploited?
Not that we know of. CVE-2026-103001 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.24% is the estimated probability that it will be exploited in the next 30 days. That is higher than 14% of all scored CVEs.
How severe is CVE-2026-103001?
CVE-2026-103001 has a CVSS v3 base score of 6.5, rated moderate. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2026-103001 affect?
Published advisories record a fix for pyjwt (Debian). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2026-103001
Markdown
[](https://tridentstack.com/cve/CVE-2026-103001)HTML
<a href="https://tridentstack.com/cve/CVE-2026-103001"><img src="https://tridentstack.com/cve/badge/CVE-2026-103001.svg" alt="CVE-2026-103001"></a>Check your Linux endpoints for this class of vulnerability
TridentStack Control continuously scans Linux endpoints for known vulnerabilities and deploys the fixes from the same console. 200 endpoints free forever, no credit card.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-08.