CVE-2026-34950
PoC —CVSS 3.1
9.1 critical
EPSS
<1%p15
Published
()
Modified
Description
fast-jwt provides fast JSON Web Token (JWT) implementation. In 6.1.0 and earlier, the publicKeyPemMatcher regex in fast-jwt/src/crypto.js uses a ^ anchor that is defeated by any leading whitespace in the key string, re-enabling the exact same JWT algorithm confusion attack that CVE-2023-48223 patched.
- Vendors
- nearform
- Products
- fast-jwt
- Weakness
- CWE-327
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
In the news0 stories
No ingested article mentions this CVE yet.