Information Exposure Affecting envoyproxy/envoy package, versions [1.35.0,1.35.13)[1.36.0,1.36.9)[1.37.0,1.37.5)[1.38.0,1.38.3)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-ENVOYPROXYENVOY-17661095
- published28 Jun 2026
- disclosed26 Jun 2026
- creditUnknown
Introduced: 26 Jun 2026
CVE-2026-47775 (opens in a new tab)How to fix?
Upgrade envoyproxy/envoy to version 1.35.13, 1.36.9, 1.37.5, 1.38.3 or higher.
Overview
Affected versions of this package are vulnerable to Information Exposure in the encrypt and decrypt functions of the OAuth2 HTTP filter, which use AES-256-CBC without an authentication tag. An attacker can recover sensitive plaintext data by exploiting the padding oracle created by differing HTTP responses to decryption success and failure, then use this information to obtain unauthorized access tokens.