---
title: "CVE-2026-116587: Go JOSE - Denial of Service"
description: "Go JOSE < 4.1.6 contains a denial of service caused by parsing attacker-controlled RSA parameters without size and consistency checks, letting remote attackers cause high CPU usage, exploit requires parsing untrusted JWKs."
url: https://panop.io/threat-heartbeat/CVE-2026-116587/
---

# CVE-2026-116587 Go JOSE - Denial of Service

Go JOSE < 4.1.6 contains a denial of service caused by parsing attacker-controlled RSA parameters without size and consistency checks, letting remote attackers cause high CPU usage, exploit requires parsing untrusted JWKs.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-116587)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

26 October 2026

Updated

27 October 2026

Weakness

[CWE-407](https://cwe.mitre.org/data/definitions/407.html)

## Vendor fix

Upgrade to version 4.1.6 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-116587](https://nvd.nist.gov/vuln/detail/CVE-2026-116587)
- [https://github.com/go-jose/go-jose/commit/a0111f82742fa92bceec9ede40845e73319e6230](https://github.com/go-jose/go-jose/commit/a0111f82742fa92bceec9ede40845e73319e6230)
- [https://github.com/go-jose/go-jose/releases/tag/v4.1.6](https://github.com/go-jose/go-jose/releases/tag/v4.1.6)
- [https://github.com/go-jose/go-jose/security/advisories/GHSA-mgcc-cww5-fp2q](https://github.com/go-jose/go-jose/security/advisories/GHSA-mgcc-cww5-fp2q)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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