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.
CVE-2025-47279
LOWNVD 3.13.1—Elevated
EchelonGraph scoreMEDIUM confidence
This low-severity CVE scores 3.1 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 82% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
3.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.1Exploit: Elevated riskExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 3.1
- EG Score
- 3.1(medium)
- EG Risk
- 30(Track)EG Risk 30/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity31% × 45%Exploitation40% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 26%
- KEV
- Not listed
Published
May 15, 2025
Last Modified
April 15, 2026
References (4)
- security-advisories@githubhttps://github.com/nodejs/undici/commit/f317618ec28753a4218beccea048bcf89c36db25
- security-advisories@githubhttps://github.com/nodejs/undici/issues/3895
- security-advisories@githubhttps://github.com/nodejs/undici/pull/4088
- security-advisories@githubhttps://github.com/nodejs/undici/security/advisories/GHSA-cxrh-j4jr-qwg3
Vendor Advisories for CVE-2025-47279(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(4 across 4 ecosystems)
Debian:12(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| node-undici | 5.15.0+dfsg1+~cs20.10.9.3-1 ... 8.9.0+dfsg+~cs3.2.0-1 (39 versions) | — | — |
Debian:13(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| node-undici | 7.15.0+dfsg+~cs3.2.0-1 ... 8.9.0+dfsg+~cs3.2.0-1 (15 versions) | — | — |
Debian:14(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| node-undici | 7.15.0+dfsg+~cs3.2.0-1 ... 7.3.0+dfsg1+~cs24.12.11-2 (7 versions) | 7.24.5+dfsg+~cs3.2.0-1 | — |
npm(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| undici | — | 7.5.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Frequently asked(5)
What is CVE-2025-47279?
CVE-2025-47279 is a low vulnerability published on May 15, 2025. 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…
When was CVE-2025-47279 disclosed?
CVE-2025-47279 was first published in the National Vulnerability Database on May 15, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-47279 actively exploited?
CVE-2025-47279 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 74.3% of all scored CVEs.
What is the CVSS score of CVE-2025-47279?
CVE-2025-47279 has a CVSS v3 base score of 3.1 (NVD).
How do I remediate CVE-2025-47279?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-47279, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-47279
Is Your Infrastructure Affected by CVE-2025-47279?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.