libuv before 0.10.34 does not properly drop group privileges, which allows context-dependent attackers to gain privileges via unspecified vectors.
Conclusion & alert: CVE-2015-0278 is rated High Risk (72/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 3.24%). Core evidence: EPSS rose +1.66% over the last day, indicating growing attacker interest. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 1.59% | 3.24% | +1.66% |
| 2 | 2025-08-25 | 1.31% | 1.59% | +0.28% |
| 3 | 2025-08-24 | — | 1.31% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
gentoo
|
normal | CVE-2015-0278: 1 GLSA(s) (201611-10), 1 atom(s) (dev-libs/libuv); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2015-0278 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2015-0278 |
ubuntu
|
low | CVE-2015-0278 low priority: Ubuntu including 1 source packages (libuv), 14 status rows across 14 suites (artful, bionic, cosmic, disco, lucid, precise, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): not-affected 7, DNE 5, ignored 1, needs-triage 1. | https://ubuntu.com/security/CVE-2015-0278 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| fedoraproject | fedora | 21 | cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:* |
| libuv_project | libuv | <= 0.10.33 | cpe:2.3:a:libuv_project:libuv:*:*:*:*:*:*:*:* |
| nodejs | node.js | < 0.10.37 | cpe:2.3:a:nodejs:node.js:*:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://advisories.mageia.org/MGASA-2015-0186.html | Third Party Advisory |
| http://www.mandriva.com/security/advisories?name=MDVSA-2015:228 | Third Party Advisory |
| https://github.com/libuv/libuv/commit/66ab38918c911bcff025562cf06237d7fedaba0c | Patch Third Party Advisory |
| https://github.com/libuv/libuv/pull/215 | Third Party Advisory |
| https://groups.google.com/forum/#%21msg/libuv/0JZxwLMtsMI/jraczskYWWQJ | |
| https://lists.fedoraproject.org/pipermail/package-announce/2015-February/150526.html | Third Party Advisory |
| https://security.gentoo.org/glsa/201611-10 | Third Party Advisory |