CVE-2026-116587

Go JOSE: DoS when parsing JWKs that contain RSA keys

State: Published
Severity: 7.5 High
Published: Oct 26, 2026
Updated: Oct 27, 2026
Reserved: Oct 26, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-407 Inefficient Algorithmic Complexity
CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
go-josego-jose	< 4.1.6Affected

References

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