Resource exhaustion in Go-Jose
CVE-2026-116587
Go JOSE provides an implementation of the Javascript Object Signing and Encryption set of standards in Go, including support for JSON Web Encryption (JWE), JSON Web Signature (JWS), and JSON Web Token (JWT) standards. Prior to 4.1.6, go-jose parses attacker-controlled RSA modulus and prime values from JWKs without enforcing size and consistency bounds before passing them to crypto/rsa.PrivateKey.Validate. On Go 1.24 and later, crafted large or degenerate RSA parameters can make that validation consume cubic CPU time, allowing remote denial of service in applications that parse JWKs from untrusted sources. This issue is fixed in version 4.1.6.
Published .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Go-Jose — versions < 4.1.6
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-116587?
- CVE-2026-116587 is a high-severity vulnerability in Go-Jose, classified under Inefficient Algorithmic Complexity. CVSS score: 7.5/10. Published 2026-10-26.
- How severe is CVE-2026-116587?
- High severity. CVSS v3 base score is 7.5 out of 10.