CVE-2026-87961

HIGHPre-NVD 7.17.1—
EchelonGraph scoreHIGH confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-10. A secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.1EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.1Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

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.

CVSS v3
7.1
EG Score
7.1HIGHhigh confidence
EG Risk
47
EG Risk 47/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity71% × 45%
Exploitation0% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.
EPSS PROB
0.5%
EPSS %ILE
38th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 10, 2026

Last Modified

September 10, 2026

Advisory Details (8)

Auto-updated Sep 10, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
generic

ESP32-audioI2S 3.4.4 through 4.0.0 Heap-based Out-of-Bounds Read via Shadowed Length Parameter in read_ID3_Header | Advisories | VulnCheck

https://www.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
generic

GitHub - schreibfaul1/ESP32-audioI2S: Play mp3 files from SD via I2S · GitHub

https://github.com/schreibfaul1/ESP32-audioI2S
generic

ESP32-audioI2S/src/Audio.cpp at f01ad7923dcf3355eeca7fb99bf8a4d9945e7478 · schreibfaul1/ESP32-audioI2S · GitHub

https://github.com/schreibfaul1/ESP32-audioI2S/blob/f01ad7923dcf3355eeca7fb99bf8a4d9945e7478/src/Audio.cpp#L2270-L2276
generic

ESP32-audioI2S/src/Audio.cpp at 490ff729eca344f06581f3e9bda9cfba948fd5a1 · schreibfaul1/ESP32-audioI2S · GitHub

https://github.com/schreibfaul1/ESP32-audioI2S/blob/490ff729eca344f06581f3e9bda9cfba948fd5a1/src/Audio.cpp#L2629-L2635
generic

ESP32-audioI2S/src/Audio.cpp at 490ff729eca344f06581f3e9bda9cfba948fd5a1 · schreibfaul1/ESP32-audioI2S · GitHub

https://github.com/schreibfaul1/ESP32-audioI2S/blob/490ff729eca344f06581f3e9bda9cfba948fd5a1/src/Audio.cpp#L2526-L2531
github_commit

commit 4dc4614b9dab (schreibfaul1/ESP32-audioI2S)

Fix landed in schreibfaul1/ESP32-audioI2S commit 4dc4614b9dab — awaiting tagged release

https://github.com/schreibfaul1/ESP32-audioI2S/commit/4dc4614b9dab2de7b342d682b1c18b109d75b677
github_pr

Fix out of bounds read in SYLT lyrics parsing

Fix merged in schreibfaul1/ESP32-audioI2S PR #1381 on 2026-08-10 — awaiting tagged release

https://github.com/schreibfaul1/ESP32-audioI2S/pull/1381
generic

Heap buffer overflow read in SYLT lyrics parsing, guard is dead code due to variable shadowing · Issue #1380 · schreibfaul1/ESP32-audioI2S · GitHub

https://github.com/schreibfaul1/ESP32-audioI2S/issues/1380

Vendor Advisories for CVE-2026-87961(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 26× in last 7d / 103× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 103 total refreshes for this CVE.

  1. 2026-10-05 11:06 UTCGHSA enrichment
  2. 2026-10-04 23:26 UTCEG score recompute
  3. 2026-10-04 23:26 UTCGHSA enrichment
  4. 2026-10-04 23:22 UTCEPSS rescore
  5. 2026-10-04 11:52 UTCGHSA enrichment
  6. 2026-10-04 00:18 UTCEG score recompute
  7. 2026-10-04 00:18 UTCGHSA enrichment
  8. 2026-10-03 12:09 UTCGHSA enrichment
  9. 2026-10-03 00:18 UTCEG score recompute
  10. 2026-10-03 00:18 UTCGHSA enrichment
  11. 2026-10-02 12:44 UTCGHSA enrichment
  12. 2026-10-02 01:10 UTCEG score recompute
  13. 2026-10-02 01:10 UTCGHSA enrichment
  14. 2026-10-01 19:51 UTCEPSS rescore
  15. 2026-10-01 13:09 UTCGHSA enrichment
  16. 2026-10-01 01:35 UTCEG score recompute
  17. 2026-10-01 01:35 UTCGHSA enrichment
  18. 2026-09-30 15:04 UTCEPSS rescore
  19. 2026-09-30 14:02 UTCGHSA enrichment
  20. 2026-09-30 01:58 UTCEG score recompute
  21. 2026-09-30 01:58 UTCGHSA enrichment
  22. 2026-09-29 12:35 UTCGHSA enrichment
  23. 2026-09-29 01:01 UTCEG score recompute
  24. 2026-09-29 01:01 UTCGHSA enrichment
  25. 2026-09-28 13:52 UTCEPSS rescore
Show 75 more
  1. 2026-09-28 13:28 UTCGHSA enrichment
  2. 2026-09-28 01:55 UTCGHSA enrichment
  3. 2026-09-27 14:08 UTCEG score recompute
  4. 2026-09-27 14:08 UTCGHSA enrichment
  5. 2026-09-27 13:48 UTCEPSS rescore
  6. 2026-09-27 02:35 UTCEG score recompute
  7. 2026-09-27 02:35 UTCGHSA enrichment
  8. 2026-09-26 15:59 UTCEPSS rescore
  9. 2026-09-26 15:01 UTCGHSA enrichment
  10. 2026-09-26 03:12 UTCEG score recompute
  11. 2026-09-26 03:12 UTCGHSA enrichment
  12. 2026-09-25 15:31 UTCGHSA enrichment
  13. 2026-09-25 03:55 UTCGHSA enrichment
  14. 2026-09-24 16:21 UTCEG score recompute
  15. 2026-09-24 16:21 UTCGHSA enrichment
  16. 2026-09-24 14:04 UTCEPSS rescore
  17. 2026-09-24 04:48 UTCEG score recompute
  18. 2026-09-24 04:48 UTCGHSA enrichment
  19. 2026-09-23 17:54 UTCEPSS rescore
  20. 2026-09-23 17:13 UTCGHSA enrichment
  21. 2026-09-23 05:38 UTCGHSA enrichment
  22. 2026-09-22 18:04 UTCEG score recompute
  23. 2026-09-22 18:04 UTCGHSA enrichment
  24. 2026-09-22 16:01 UTCEPSS rescore
  25. 2026-09-22 06:30 UTCEG score recompute
  26. 2026-09-22 06:30 UTCGHSA enrichment
  27. 2026-09-21 21:09 UTCEPSS rescore
  28. 2026-09-21 18:57 UTCGHSA enrichment
  29. 2026-09-21 07:23 UTCEG score recompute
  30. 2026-09-21 07:23 UTCGHSA enrichment
  31. 2026-09-20 20:16 UTCEPSS rescore
  32. 2026-09-20 19:35 UTCGHSA enrichment
  33. 2026-09-20 08:02 UTCGHSA enrichment
  34. 2026-09-19 20:27 UTCEG score recompute
  35. 2026-09-19 20:27 UTCGHSA enrichment
  36. 2026-09-19 08:53 UTCGHSA enrichment
  37. 2026-09-18 21:19 UTCEG score recompute
  38. 2026-09-18 21:19 UTCGHSA enrichment
  39. 2026-09-18 19:28 UTCEPSS rescore
  40. 2026-09-18 09:07 UTCGHSA enrichment
  41. 2026-09-17 21:34 UTCEG score recompute
  42. 2026-09-17 21:34 UTCGHSA enrichment
  43. 2026-09-17 19:32 UTCEPSS rescore
  44. 2026-09-17 10:00 UTCGHSA enrichment
  45. 2026-09-16 22:26 UTCEG score recompute
  46. 2026-09-16 22:26 UTCGHSA enrichment
  47. 2026-09-16 14:09 UTCEPSS rescore
  48. 2026-09-16 10:53 UTCEG score recompute
  49. 2026-09-16 10:53 UTCGHSA enrichment
  50. 2026-09-16 05:15 UTCEPSS rescore
  51. 2026-09-15 23:19 UTCGHSA enrichment
  52. 2026-09-15 11:45 UTCEG score recompute
  53. 2026-09-15 11:45 UTCGHSA enrichment
  54. 2026-09-15 03:12 UTCEPSS rescore
  55. 2026-09-15 00:11 UTCGHSA enrichment
  56. 2026-09-14 12:37 UTCGHSA enrichment
  57. 2026-09-14 00:52 UTCEG score recompute
  58. 2026-09-14 00:52 UTCGHSA enrichment
  59. 2026-09-13 16:48 UTCEPSS rescore
  60. 2026-09-13 13:19 UTCGHSA enrichment
  61. 2026-09-13 01:46 UTCEG score recompute
  62. 2026-09-13 01:46 UTCGHSA enrichment
  63. 2026-09-12 15:02 UTCEPSS rescore
  64. 2026-09-12 14:12 UTCGHSA enrichment
  65. 2026-09-12 02:39 UTCGHSA enrichment
  66. 2026-09-11 15:05 UTCEG score recompute
  67. 2026-09-11 15:05 UTCGHSA enrichment
  68. 2026-09-11 14:53 UTCEPSS rescore
  69. 2026-09-11 14:53 UTCEPSS rescore
  70. 2026-09-11 03:31 UTCGHSA enrichment
  71. 2026-09-10 15:57 UTCGHSA enrichment
  72. 2026-09-10 15:22 UTCEG score recompute
  73. 2026-09-10 15:22 UTCGHSA enrichment
  74. 2026-09-10 15:00 UTCEG score recompute
  75. 2026-09-10 15:00 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-87961?
CVE-2026-87961 is a high vulnerability published on September 10, 2026. ESP32-audioI2S versions 3.4.4 through 4.0.0 contain a heap-based out-of-bounds read vulnerability in the readID3Header 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…
When was CVE-2026-87961 disclosed?
CVE-2026-87961 was first published on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-87961 actively exploited?
CVE-2026-87961 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (38th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-87961?
CVE-2026-87961 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-87961?
An upstream fix for CVE-2026-87961 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-87961 are linked in the Vendor Advisories panel on this page.

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