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HIGH severity

goxmldsig vulnerable to crash on nil-pointer dereference caused by sending malformed XML signaturesGHSA-mqqv-chpx-vq25

HIGH

GHSA-mqqv-chpx-vq25 is a high-severity (CVSS 7.5) NULL Pointer Dereference vulnerability in github.com/russellhaering/goxmldsig. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for github.com/russellhaering/goxmldsig — see the affected versions and patch details below.

Also known asCVE-2020-7711CVE-2020-7731GHSA-gq5r-cc4w-g8xfGHSA-prjq-f4q3-fvfrGO-2020-0046SNYK-GOLANG-GITHUBCOMRUSSELLHAERINGGOSAML2-608302
Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
1 known
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs79th percentile — riskier than 79% of all scored CVEsHighest risk
0.00%0.77%1.54%2.30%0.4%1.8%May 26Sep 26Nov 26

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

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
🐹github.com/russellhaering/goxmldsig🐹github.com/russellhaering/gosaml2

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

This affects all versions of package github.com/russellhaering/goxmldsig prior to 1.1.1. There is a crash on nil-pointer dereference caused by sending malformed XML signatures. This issue is patched in version 1.1.1.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/russellhaering/goxmldsigall versions1.1.1go get github.com/russellhaering/goxmldsig@v1.1.1
🐹Gogithub.com/russellhaering/gosaml2all versions0.7.0go get github.com/russellhaering/gosaml2@v0.7.0

Affected Products

1 product · 1 configurations
Application
goxmldsiggoxmldsig_project
all
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

This affects all versions of package github.com/russellhaering/goxmldsig…

github.comNVDAug 2020

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update github.com/russellhaering/goxmldsig to 1.1.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-mqqv-chpx-vq25 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

This affects all versions of package github.com/russellhaering/goxmldsig prior to 1.1.1. There is a crash on nil-pointer dereference caused by sending malformed XML signatures. This issue is patched in version 1.1.1.
O3 Security · Impact-Aware SCA

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goxmldsig vulnerable to crash on nil-pointer dereference…