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MEDIUM severity

Duplicate Advisory: TLS certificate validation error in mellium.im/xmppGHSA-m658-p24x-p74r

MEDIUMFix: mellium/xmpp#260

GHSA-m658-p24x-p74r is a medium-severity (CVSS 5.9) CWE-295 vulnerability in mellium.im/xmpp. A fix is available for mellium.im/xmpp — see the affected versions and patch details below.

Also known asCVE-2022-24968GHSA-h289-x5wc-xcv8GO-2022-0370
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 11, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs44th percentile — riskier than 44% of all scored CVEsHighest risk
0.00%0.35%0.69%1.04%0.2%0.5%0.5%0.5%May 26Oct 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

GHSA-m658-p24x-p74r by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🐹mellium.im/xmpp

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

Description

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-h289-x5wc-xcv8. This link is maintained to preserve external references.

Original Description

In Mellium mellium.im/xmpp through 0.21.0, an attacker capable of spoofing DNS TXT records can redirect a WebSocket connection request to a server under their control without causing TLS certificate verification to fail. This occurs because the wrong host name is selected during this verification.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐹Gomellium.im/xmpp≥ 0.18.0&&< 0.21.10.21.1go get mellium.im/xmpp@v0.21.1

Affected Products

1 product · 1 configurations
Application
xmppmellium
≥ 0.18.0 && < 0.21.1
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mellium.im/xmpp, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update mellium.im/xmpp to 0.21.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-m658-p24x-p74r is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-h289-x5wc-xcv8. This link is maintained to preserve external references. ## Original Description In Mellium mellium.im/xmpp through 0.21.0, an attacker capable of spoofing DNS TXT records can redirect a WebSocket connection request to a server under their control without causing TLS certificate verification to fail. This occurs because the wrong host name is selected during this verification.
O3 Security · Impact-Aware SCA

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