CVE-2026-89086
CRITICAL
9.1
CVSS Score
Published: September 10, 2026 at 07:52 PM UTC
Updated: September 22, 2026 at 08:11 PM UTC
1 product affected across 1 vendorJose
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Severity
CRITICAL9.1
Exploit prediction
EPSS 0.3%
SSVC
PoC
Description
In the jose package before 0.11.0 for OCaml, library calls to validate an RSA signature only confirm that PKCS #1 decoding succeeds, and proceed to declare the signature valid without the required steps that involve the public key.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (2)
Source: cverecord
https://osv.dev/vulnerability/OSEC-2026-19SSVC — Action Prioritization
SSVCPoCAutomatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
9.1CRITICALmitre
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusDEFERRED
CWE
CWE-347
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