CVE-2026-48526High· 7.4▾ MidnightPoC availablePyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorith…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 40.7 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Jul 31.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.4%
Last analysed / modified upstream
Exploit / PoC code exists
0.4% → 0.4%
PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, when the verifier is decoding JSON Web Tokens, while supporting both asymmetric and HMAC algorithms, the library does not validate use of JSON Web Keys in HMAC algorithm, allowing attacker to use the issuer public key as the secret key for HMAC algorithm. This vulnerability is fixed in 2.13.0.
pyjwt < 2.13.0Upgrade past the affected range:
pyjwt 2.13.0Affected packages:
pyjwt < 2.13.0Patched in:
pyjwt 2.13.0Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-32597High· 7.5PyJWT is a JSON Web Token implementation in Python
CVE-2026-102275Medium· 6.5PyJWT is a Python implementation of JSON Web Token standards
CVE-2026-102271High· 7.4PyJWT is a Python implementation of JSON Web Token standards
CVE-2026-102272High· 7.4PyJWT is a Python implementation of JSON Web Token standards
CVE-2026-102268Critical· 9.1PyJWT is a Python implementation of JSON Web Token standards
CVE-2026-102266High· 7.4PyJWT is a Python implementation of JSON Web Token standards