CVE-2020-25017

HighCVSS 8.3/10Last modified Jun 17, 2026

Description

Envoy through 1.15.0 only considers the first value when multiple header values are present for some HTTP headers. Envoy’s setCopy() header map API does not replace all existing occurences of a non-inline header.

Metrics

CVSS 3.1 8.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/envoyproxy/envoy/security/advisories/GHSA-2v25-cjjq-5f4wExploit, Third Party Advisory
https://groups.google.com/forum/#%21forum/envoy-security-announce
https://github.com/envoyproxy/envoy/security/advisories/GHSA-2v25-cjjq-5f4wExploit, Third Party Advisory
https://groups.google.com/forum/#%21forum/envoy-security-announce

Timeline

Published: Oct 1, 2020
Last modified: Jun 17, 2026
NVD status: Modified

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