Improper input validation in Envoyproxy Envoy
CVE-2026-26310
Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.005 (37.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Envoyproxy Envoy — versions >= 1.37.0, < 1.37.1, 1.37.0, < 1.34.13
Weakness classification (CWE)
References
- github.com/envoyproxy/envoy/security/advisories/GHSA-3cw6-2j68-868p (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-26310?
- CVE-2026-26310 is a medium-severity vulnerability in Envoyproxy Envoy, classified under Improper Input Validation. CVSS score: 5.9/10. Published 2026-03-10.
- How severe is CVE-2026-26310?
- Medium severity. CVSS v3 base score is 5.9 out of 10.