GHSA-c76h-2ccp-4975 is a medium-severity (CVSS 6.8) Insufficient Random Values vulnerability in undici. A fix is available for undici — see the affected versions and patch details below.
Exploitation Status
Proof-of-concept exploit code exists
- CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.
- A successful exploit gives an attacker total control of the affected component, not partial access.
Exploitation and automatability from CISA’s SSVC triage for GHSA-c76h-2ccp-4975.
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
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.
undicinpmDescription
Impact
Undici fetch() uses Math.random() to choose the boundary for a multipart/form-data request. It is known that the output of Math.random() can be predicted if several of its generated values are known.
If there is a mechanism in an app that sends multipart requests to an attacker-controlled website, they can use this to leak the necessary values. Therefore, An attacker can tamper with the requests going to the backend APIs if certain conditions are met.
Patches
This is fixed in 5.28.5; 6.21.1; 7.2.3.
Workarounds
Do not issue multipart requests to attacker controlled servers.
References
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | undici | ≥ 4.5.0&&< 5.28.5 | 5.28.5npm install undici@5.28.5 |
| 📦npm | undici | ≥ 6.0.0&&< 6.21.1 | 6.21.1npm install undici@6.21.1 |
| 📦npm | undici | ≥ 7.0.0&&< 7.2.3 | 7.2.3npm install undici@7.2.3 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for undici, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update undici to 5.28.5 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-c76h-2ccp-4975 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.
MODERATE impact: CVE-2025-22150 affects Red Hat products and community streams that ship the undici component. In affected applications, undici uses Math.random() to select multipart/form-data boundaries; an attacker-controlled destination can observe enough generated values to predict the boundary and, under the…
Until a vendor-provided update containing the fix is available, do not send multipart/form-data requests from affected applications to attacker-controlled destinations. Restrict outbound destinations for such requests with an allowlist or firewall policy, or disable the application feature or path that sends these requests where operationally possible. Upgrade to a vendor-provided update containing the fix when available.Source: Red Hat security advisory for GHSA-c76h-2ccp-4975 (CC BY 4.0)
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Developer Hub 1.3 on RHEL 9 | rhdh-hub-container-1.3-142 | RHSA-2025:1454 |
| Red Hat Enterprise Linux 8 | nodejs:20-8100020250203134842.489197e6 | RHSA-2025:1351 |
| Red Hat Enterprise Linux 8 | nodejs:18-8100020250207121904.489197e6 | RHSA-2025:1582 |
| Red Hat Enterprise Linux 8 | nodejs:22-8100020250130144944.6d880403 | RHSA-2025:1611 |
| Red Hat Enterprise Linux 9 | nodejs:20-9050020250130114516.rhel9 | RHSA-2025:1443 |
| Red Hat Enterprise Linux 9 | nodejs:18-9050020250206154514.rhel9 | RHSA-2025:1446 |
| Red Hat Enterprise Linux 9 | nodejs:22-9050020250131131518.rhel9 | RHSA-2025:1613 |
| Red Hat Developer Hub 1.5 | rhdh/rhdh-hub-rhel9:1.5 | RHSA-2025:3374 |
Frequently Asked Questions
Is GHSA-c76h-2ccp-4975 in your dependencies?
Find it across npm, including transitive dependencies.