CVE-2026-116586: Go JOSE: Panics in JSON parsing

Severity: medium (CVSS 6.9 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-26 · updated 2026-10-30
Weakness: CWE-674

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 4.1.5, parsing attacker-controlled JSON through go-jose allows deeply nested arrays or objects to exceed Go's stack limit. The resulting stack overflow crashes the application and permits denial of service in applications that parse untrusted JSON through go-jose. This issue is fixed in version 4.1.5.

Affected products

go-jose: before 4.1.5

References

https://github.com/go-jose/go-jose/commit/a31af25836222f4c45d366d6e8f9b1049dd9935a
https://github.com/go-jose/go-jose/pull/290
https://github.com/go-jose/go-jose/releases/tag/v4.1.5
https://github.com/go-jose/go-jose/security/advisories/GHSA-vvm8-gf78-28g4

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