BIT-envoy-2026-47775
See a problem?- Import Source
- https://github.com/bitnami/vulndb/tree/main/data/envoy/BIT-envoy-2026-47775.json
- JSON Data
- https://api.osv.dev/v1/vulns/BIT-envoy-2026-47775
- Aliases
-
- CVE-2026-47775
- GHSA-396h-jpq4-vc7p
- Published
- 2026-06-30T23:39:29.055Z
- Modified
- 2026-07-08T08:11:11.121639042Z
- Summary
- Envoy OAuth2 Filter: Padding Oracle via AES-256-CBC Cookie Decryption
- Details
-
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 HMAC, no AEAD). The /callback endpoint returns HTTP 302 on successful decryption and HTTP 401 on padding failure, creating a padding oracle. An attacker who obtains the encrypted CodeVerifier cookie can recover the plaintext PKCE code_verifier in ~6,200 requests (~100 seconds), then exchange it with a stolen authorization code to obtain the victim's access token. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.
- Database specific
{ "cpes": [ "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*" ], "severity": "Medium" }- References
Affected packages
Bitnami / envoy
Package
- Name
- envoy
- Purl
- pkg:bitnami/envoy
Severity
- 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N CVSS Calculator