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CVE-2026-87961

7.1 · HIGH

ESP32-audioI2S versions 3.4.4 through 4.0.0 contain a heap-based out-of-bounds read vulnerability in the read_ID3_Header function due to a shadowed length parameter in ID3 synchronized-lyrics proce…

Published Sep 10, 2026CWE-125EPSS 0.47%

Overview

CVE-2026-87961 is a high-severity vulnerability. It was published on September 10, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

ESP32-audioI2S versions 3.4.4 through 4.0.0 contain a heap-based out-of-bounds read vulnerability in the read_ID3_Header function due to a shadowed length parameter in ID3 synchronized-lyrics processing. Attackers can craft malicious MP3 files or HTTP audio streams with oversized frame size declarations to read past allocated buffer boundaries, causing device crashes or exposing adjacent heap memory.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/schreibfaul1/ESP32-audioI2SGitHubgithub.com/schreibfaul1/ESP32-audioI2S/blob/490ff729eca344f06581f3e9bda9cfba948fd5a1/src/Audio.cpp#L2526-L2531GitHubgithub.com/schreibfaul1/ESP32-audioI2S/blob/490ff729eca344f06581f3e9bda9cfba948fd5a1/src/Audio.cpp#L2629-L2635GitHubgithub.com/schreibfaul1/ESP32-audioI2S/blob/f01ad7923dcf3355eeca7fb99bf8a4d9945e7478/src/Audio.cpp#L2270-L2276GitHubgithub.com/schreibfaul1/ESP32-audioI2S/commit/4dc4614b9dab2de7b342d682b1c18b109d75b677GitHubgithub.com/schreibfaul1/ESP32-audioI2S/issues/1380GitHubgithub.com/schreibfaul1/ESP32-audioI2S/pull/1381Refwww.vulncheck.com/advisories/esp32-audioi2s-3.4.4-through-4.0.0-heap-based-out-of-bounds-read-via-shadowed-length-parameter-in-read-id3-header

How CyberStrike helps

Frequently asked questions

What is CVE-2026-87961?

CVE-2026-87961 is a high-severity vulnerability. It was published on September 10, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-87961?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-87961?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-87961?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-87961 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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