golang.org/x/oauth2 Improper Validation of Syntactic Correctness of Input vulnerabilityGHSA-6v2p-p543-phr9
HIGHGHSA-6v2p-p543-phr9 is a high-severity (CVSS 7.5) CWE-1286 vulnerability in golang.org/x/oauth2. A fix is available for golang.org/x/oauth2 — see the affected versions and patch details below.
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.
- 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 GHSA-6v2p-p543-phr9.
EPSS Exploitation Probability
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
golang.org/x/oauth2Real-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
An attacker can pass a malicious malformed token which causes unexpected memory to be consumed during parsing.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | golang.org/x/oauth2 | all versions | 0.27.0go get golang.org/x/oauth2@v0.27.0 |
Affected Products
jwsgoDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for golang.org/x/oauth2, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update golang.org/x/oauth2 to 0.27.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-6v2p-p543-phr9 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.
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.
IMPORTANT impact: CVE-2025-22868 affects Red Hat product components that use golang.org/x/oauth2/jws, including components across Red Hat Enterprise Linux, OpenShift, cloud, management, Ansible, Ceph, and other Red Hat products. An unauthenticated remote attacker can submit a maliciously crafted token containing a…
To mitigate this vulnerability, it is recommended to pre-validate any payloads passed to `go-jose` to check that they do not contain an excessive amount of `.` characters.Source: Red Hat security advisory for GHSA-6v2p-p543-phr9 (CC BY 4.0)
| Product | Fixed in | Advisory |
|---|---|---|
| Cryostat 4 on RHEL 9 | cryostat/cryostat-agent-init-rhel9:0.5.0-9 | RHSA-2025:3503 |
| gatekeeper 3.15 for RHEL 9 | gatekeeper/gatekeeper-operator-bundle:v3.15.4-1 | RHSA-2025:3053 |
| gatekeeper 3.17 for RHEL 9 | gatekeeper/gatekeeper-operator-bundle:v3.17.2-2 | RHSA-2025:3051 |
| multicluster engine for Kubernetes 2.4 for RHEL 8 | multicluster-engine/addon-manager-rhel8:v2.4.9-5 | RHSA-2025:8390 |
| multicluster engine for Kubernetes 2.5 for RHEL 8 | multicluster-engine/agent-service-rhel8:v2.5.9-8 | RHSA-2025:4473 |
| multicluster engine for Kubernetes 2.6 for RHEL 8 | multicluster-engine/assisted-image-service-rhel8:v2.6.7-11 | RHSA-2025:4605 |
| multicluster engine for Kubernetes 2.7 for RHEL 8 | multicluster-engine/assisted-service-8-rhel8:v2.7.4-18 | RHSA-2025:3987 |
| multicluster engine for Kubernetes 2.8 for RHEL 8 | multicluster-engine/assisted-service-8-rhel8:v2.8.1-4 | RHSA-2025:3720 |
Frequently Asked Questions
Is GHSA-6v2p-p543-phr9 in your dependencies?
Find it across Go, including transitive dependencies.