What is CVE-2026-47775?

CVE-2026-47775 is a medium-severity vulnerability in Envoyproxy Envoy, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 6.8/10. Published 2026-06-26.

How severe is CVE-2026-47775?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Information disclosure in Envoyproxy Envoy

CVE-2026-47775

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, the OAuth2 HTTP filter's encrypt()/decrypt() functions use AES-256-CBC without an authentication tag (no H…

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N.

Affected products

Envoyproxy Envoy — versions >= 1.38.0, < 1.38.1, >= 1.37.0, < 1.37.3, >= 1.36.0, < 1.36.7

Weakness classification (CWE)

CWE-209 — Generation of Error Message Containing Sensitive Information
CWE-327 — Use of a Broken or Risky Cryptographic Algorithm

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-47775?: CVE-2026-47775 is a medium-severity vulnerability in Envoyproxy Envoy, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 6.8/10. Published 2026-06-26.
How severe is CVE-2026-47775?: Medium severity. CVSS v3 base score is 6.8 out of 10.