{"id":"CVE-2026-103001","title":"PyJWT is a Python implementation of JSON Web Token standards","summary":"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…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N","cwe":["CWE-471","CWE-358"],"vendor":"pyjwt_project","product":"pyjwt","affected":["pyjwt >= 2.11.0, < 2.13.0"],"patched":["pyjwt 2.13.0"],"published":"2026-09-30","updated":"2026-10-08","sourceUpdated":"2026-10-08T13:13:53.857","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103001","references":[{"url":"https://github.com/jpadilla/pyjwt/commit/0c87c8c8b1a74cac99ad8115f3050efcb7fbed35","label":"security-advisories@github.com"},{"url":"https://github.com/jpadilla/pyjwt/issues/679","label":"security-advisories@github.com"},{"url":"https://github.com/jpadilla/pyjwt/security/advisories/GHSA-gvp8-978c-rx2q","label":"security-advisories@github.com"},{"url":"https://github.com/jpadilla/pyjwt/security/advisories/GHSA-gvp8-978c-rx2q","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-gvp8-978c-rx2q"},{"url":"https://github.com/jpadilla/pyjwt"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-103001.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-103001"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2544369"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-103001"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103001"},{"url":"https://pypi.org/project/pyjwt"},{"url":"https://access.redhat.com/errata/RHSA-2026:82415"},{"url":"https://access.redhat.com/errata/RHSA-2026:82368"},{"url":"https://access.redhat.com/errata/RHSA-2026:82061"},{"url":"https://access.redhat.com/errata/RHSA-2026:82059"},{"url":"https://access.redhat.com/errata/RHSA-2026:82371"}],"tags":["nvd","cve.org","exploit-available","ghsa","pip","osv","csaf","vex","red-hat"],"epss":0.00257,"epssPercentile":0.17465,"aliases":["GHSA-gvp8-978c-rx2q","PYSEC-2026-4146"],"ecosystem":"pip","exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-05T23:47:10.360725Z"},"ingestedAt":"2026-09-30T22:27:27.820Z","slug":"CVE-2026-103001","body":"## Overview\n\nPyJWT 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.\n\n## Affected\n\n- `pyjwt >= 2.11.0, < 2.13.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `pyjwt 2.13.0`\n\n## Package advisory (CVE-2026-103001)\n\nAffected packages:\n\n- `PyJWT >= 2.11.0, <= 2.13.0`\n\nSource: https://github.com/advisories/GHSA-gvp8-978c-rx2q\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Ansible Automation Orchestrator 2026, Confidential Compute Attestation, Fence Agents Remediation Operator, Lightspeed Core, Migration Toolkit for Applications 8, OpenShift Lightspeed, … · no fix planned: Ansible Automation Orchestrator 2026, Confidential Compute Attestation, Fence Agents Remediation Operator, Lightspeed Core, … · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-103001.json)\n- **RHSA-2026:82415** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82415)\n- **RHSA-2026:82368** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82368)\n- **RHSA-2026:82061** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82061)\n- **RHSA-2026:82059** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82059)\n- **RHSA-2026:82371** · Red Hat · fixed in: Red Hat AI Inference Server 3.5 · released 2026-10-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:82371)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":216112,"id":"CVE-2026-103001","ts":1791247092667,"field":"exploit_available","old":"false","new":"true"}]}