CVE Explorer
CVE-2026-42855
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
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"arduino-esp32","vendor":"espressif","versions":[{"status":"affected","version":"< 3.3.8"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:66adf96e8d18a2d8aec7c3ad44f0db64d6f5b3399e7938d6b988483281b0d918 · sha256:6ffd4e912f17f657… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:66adf96e8d18a2d8aec7c3ad44f0db64d6f5b3399e7938d6b988483281b0d918 · sha256:6ffd4e912f17f657… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:66adf96e8d18a2d8aec7c3ad44f0db64d6f5b3399e7938d6b988483281b0d918 · sha256:6ffd4e912f17f657… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"https://github.com/espressif/arduino-esp32/security/advisories/GHSA-28hv-fwm3-rpcq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/espressif/arduino-esp32/security/advisories/GHSA-28hv-fwm3-rpcq"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:66adf96e8d18a2d8aec7c3ad44f0db64d6f5b3399e7938d6b988483281b0d918 · sha256:6ffd4e912f17f657… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.