CVE-2026-96760Not scored
CVE-2026-96760: Authlib library contains a signature‑verification bypass vulnerability
No fix listed · Affected: Authlib · Exploitation: public proof of concept (unverified)
ExploitationProof of concept public
Not in CISA KEV as of catalogue 2026.11.13 (13 Nov)
- In CISA KEV: not seen
- Exploited (reported): not seen
- Scanning observed: not seen
- Proof of concept public1 public GitHub repository (unverified), listed by PoC-in-GitHub30 Sep
- Not established: not seen
0.4%probability of exploitation in the next 30 days
38th percentile
050100
Higher than 38% of scored CVEs
Not scored yet. NVD has not published a CVSS score.
DescriptionNVD
Authlib (v1.8.0 and below) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking for a signature and without requiring a cryptographic key.
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Authlib
- Published
- September 2026
What changed
- PoC-in-GitHub lists 1 public GitHub repository (unverified) PoC-in-GitHub
Coverage1 article · 1 outlet
First in our coverage: SecurityOnline, 29 Sep.
- Authlib Flaw Lets Attackers Forge JWT Signatures Without KeysSecurityOnline · first in our coverage
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