CVE-2025-47279
CVE-2025-47279 is a low-severity vulnerability with a CVSS 3.x base score of 3.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-401.
Key facts
- Severity: Low (CVSS 3.x base score 3.1)
- EPSS exploit prediction: 0% (17th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-15389
- Weakness: CWE-401
- Published:
- Last modified:
Description
Undici is an HTTP/1.1 client for Node.js. Prior to versions 5.29.0, 6.21.2, and 7.5.0, applications that use undici to implement a webhook-like system are vulnerable. If the attacker set up a server with an invalid certificate, and they can force the application to call the webhook repeatedly, then they can cause a memory leak. This has been patched in versions 5.29.0, 6.21.2, and 7.5.0. As a workaound, avoid calling a webhook repeatedly if the webhook fails.
Frequently asked questions
- What is CVE-2025-47279?
- Undici is an HTTP/1.1 client for Node.js. Prior to versions 5.29.0, 6.21.2, and 7.5.0, applications that use undici to implement a webhook-like system are vulnerable. If the attacker set up a server with an invalid certificate, and they can force the application to call the webhook repeatedly, then they can cause a memory leak. This has been patched in versions 5.29.0, 6.21.2, and 7.5.0. As a workaound, avoid calling a webhook repeatedly if the webhook fails.
- How severe is CVE-2025-47279?
- CVE-2025-47279 has a CVSS 3.x base score of 3.1, rated low severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
- Is CVE-2025-47279 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2025-47279?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2025-47279 have an EU (EUVD) identifier?
- Yes. CVE-2025-47279 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-15389.
- When was CVE-2025-47279 published?
- CVE-2025-47279 was published on 2025-05-15 and last updated on 2026-06-17.
References
- https://github.com/nodejs/undici/commit/f317618ec28753a4218beccea048bcf89c36db25
- https://github.com/nodejs/undici/issues/3895
- https://github.com/nodejs/undici/pull/4088
- https://github.com/nodejs/undici/security/advisories/GHSA-cxrh-j4jr-qwg3
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