Vigie VulnDBEuropean-hosted Vulnerability DB

CVE-2023-35943

Envoy vulnerable to CORS filter segfault when origin header is removed

At a glance

Severity
MEDIUM 6.3
EPSS
EPSS 0.66 % · percentile 51 (2026-10-28)
State
PUBLISHED
Published
Updated
Assigner
GitHub_M
NVD status
Modified

Description

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, the CORS filter will segfault and crash Envoy when the `origin` header is removed and deleted between `decodeHeaders`and `encodeHeaders`. Versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12 have a fix for this issue. As a workaround, do not remove the `origin` header in the Envoy configuration.

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 6.3CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:HGitHub_M
CVSS 3.1MEDIUM 6.3CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:HNVD · security-advisories@github.com (Secondary)
CVSS 3.1HIGH 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
envoyproxy · envoyaffected >= 1.26.0, < 1.26.4 ; affected >= 1.25.0, < 1.25.9 ; affected >= 1.24.0, < 1.24.10 ; affected < 1.23.12

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD