CVE-2022-41912 is a critical-severity (CVSS 9.1) Improper Authentication vulnerability in github.com/crewjam/saml. A fix is available for github.com/crewjam/saml — see the affected versions and patch details below.
crewjam/saml go library is vulnerable to signature bypass via multiple Assertion elements
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2022-41912.
EPSS Exploitation Probability
EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.
How urgent is this, really
CVE-2022-41912 plotted by exploitation likelihood (EPSS) against impact (CVSS). The shaded corner — EPSS 50%+ and CVSS 7.0+ — is where this CVE doesn't sit, though severity or exploitability alone can still warrant action.
Where this sits among everything scored
Of 377,333 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Real counts from FIRST.org, not a sample — log-scaled since the landscape is heavily right-skewed.
Real-World Exposure
github.com/crewjam/samlReal-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
Impact
The crewjam/saml go library is vulnerable to an authentication bypass when processing SAML responses containing multiple Assertion elements.
Patches
This issue has been corrected in version 0.4.9.
Credit
This issue was reported by Felix Wilhelm from Google Project Zero.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/crewjam/saml | all versions | 0.4.9go get github.com/crewjam/saml@v0.4.9 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/crewjam/saml, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/crewjam/saml to 0.4.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-41912 is resolved across your whole dependency graph.
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.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2022-41912 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2022-41912. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
Whilst the Red Hat Advanced Cluster Management for Kubernetes (RHACM) acm-grafana container include the vulnerable underscore library, the access to it is protected by OpenShift OAuth. Therefore the impact by this flaw is reduced from Critical to Important. The OCP grafana-container includes the vulnerable underscore…
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Ceph Storage 6.1 | rhceph/rhceph-6-dashboard-rhel9:6-75 | RHSA-2023:3642 |
| Red Hat OpenShift Container Platform 4.10 | openshift4/ose-grafana:v4.10.0-202301040925.p0.gca476d4.assembly.stream | RHSA-2023:0032 |
| Red Hat OpenShift Container Platform 4.11 | openshift4/ose-grafana:v4.11.0-202212190555.p0.gbc05ec1.assembly.stream | RHSA-2022:9108 |
| Red Hat OpenShift Container Platform 4.8 | openshift4/ose-grafana:v4.8.0-202301100925.p0.g7156d02.assembly.stream | RHSA-2023:0237 |
| Red Hat OpenShift Container Platform 4.9 | openshift4/ose-grafana:v4.9.0-202301301454.p0.g06135eb.assembly.stream | RHSA-2023:0574 |
Frequently Asked Questions
Is CVE-2022-41912 in your dependencies?
O3 Security finds CVE-2022-41912 across Go dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.