{"schemaVersion":3,"id":"CVE-2026-103001","aliases":["GHSA-gvp8-978c-rx2q","PYSEC-2026-4146","UBUNTU-CVE-2026-103001","DEBIAN-CVE-2026-103001","CGA-762x-4q79-v35r","CGA-x9fq-wwpv-92p3","CGA-349g-hxj5-q8m4","CGA-3c56-h342-7w47","CGA-3fvf-w238-wc98","CGA-43x5-jrxh-m9gm","CGA-6r8c-2j6c-344v","CGA-9399-mj9h-g4vr","CGA-988g-qpgg-hq6j","CGA-cm9p-9gvg-qmr2","CGA-hj8v-j75c-4wrr","CGA-jrhp-r559-2pjr","CGA-mvx3-m8gx-hrhp","CGA-q9w9-vr7x-8hj7","CGA-rpp2-32xx-x8w3"],"status":"published","duplicateOf":null,"title":null,"description":"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. 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