CVE•Published 2026-05-28•Modified 2026-06-01•0 articles on news•5 live references•NVD data

CVE-2026-48526Pyjwt_project · Pyjwt

Vulnerability data via NVD (ingested)

CVSS v3.1

7.4

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS percentile

—

Weaknesses (CWE)

CWE-287Improper Authentication CWE-347Improper Verification of Cryptographic Signature

Description

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.

Timeline

Published 2026-05-28

Modified 2026-06-01

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-48526

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Pyjwt Project Pyjwt"

All exposed Pyjwt Project Pyjwt instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Pyjwt"

HTTP body or banner mentions "Pyjwt" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-48526