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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-42855

arduino-esp32: Digest authentication URI mismatch bypass in WebServer allows cross-resource replay attack

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Status
Published
Published
Updated
Assigning organization
GitHub_M

Description

arduino-esp32 is an Arduino core for the ESP32, ESP32-S2, ESP32-S3, ESP32-C3, ESP32-C6 and ESP32-H2 microcontrollers. Prior to 3.3.8, the WebServer Digest authentication implementation in arduino-esp32 computes the authentication hash using the URI field from the client's Authorization header, without verifying that it matches the actual requested URI. This allows an attacker who possesses any valid digest response (computed for URI-A) to authenticate requests to a completely different protected URI (URI-B), bypassing per-resource access control. This vulnerability is fixed in 3.3.8.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

espressif arduino-esp32

  • < 3.3.8affected

References