CVE-2026-103001

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-103001
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103001.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-103001
Aliases
Downstream
CGA (2)
DEBIAN (1)
Published
2026-09-30T21:15:12Z
Modified
2026-10-01T11:45:37Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N CVSS Calculator
Summary
PyJWT.decode() reintroduces options-dict mutation, enabling silent claim-verification bypass on dict reuse
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-471"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103001.json"
}
References

Affected packages

Git / github.com/jpadilla/pyjwt

Affected ranges

Type
GIT
Repo
https://github.com/jpadilla/pyjwt
Events
Introduced
697344d25990641b8b2aa85f0a60634b590b5702
Last Affected
7144e4534c34810f4525dc4578a32addd8212cff
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "2.11.0"
        },
        {
            "last_affected":  "2.13.0"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

2.*
2.11.0
2.12.0
2.12.1
2.13.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103001.json"