CVE-2026-78161

HIGHPre-NVD 7.37.3—
EchelonGraph scoreHIGH confidence

Score 7.3 from GitHub Security Advisory published 2026-08-24. a secondary CVSS source baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A vulnerability was found in warmcat libwebsockets 4.5.0. Impacted is the function report_raw_cbor of the file lib/misc/lecp.c of the component LECP CBOR Recording. The manipulation results in out-of-bounds write. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as 1d44554a1bb262db63ff4e240152a9deecd99054. It is best practice to apply a patch to resolve this issue.

CVSS v3
7.3
EG Score
7.3(high)
EG Risk
64(Attend)
EG Risk 64/100SSVC: Attend

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
Severity73% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

August 24, 2026

Last Modified

August 24, 2026

Advisory Details (4)

Auto-updated Aug 24, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

GitHub - warmcat/libwebsockets: canonical libwebsockets.org networking library · GitHub

https://github.com/warmcat/libwebsockets/
github_commit

commit 1d44554a1bb2 (warmcat/libwebsockets)

Fix landed in warmcat/libwebsockets commit 1d44554a1bb2 — awaiting tagged release

https://github.com/warmcat/libwebsockets/commit/1d44554a1bb262db63ff4e240152a9deecd99054
generic

pocs/libwebsockets-lecp-lecp_parse-cbor_pos_oob_write/poc_lecp_cbor_pos_oob.c at main · biniamf/pocs · GitHub

https://github.com/biniamf/pocs/blob/main/libwebsockets-lecp-lecp_parse-cbor_pos_oob_write/poc_lecp_cbor_pos_oob.c
generic

pocs/libwebsockets-lecp-lecp_parse-cbor_pos_oob_write at main · biniamf/pocs · GitHub

https://github.com/biniamf/pocs/tree/main/libwebsockets-lecp-lecp_parse-cbor_pos_oob_write

Vendor Advisories for CVE-2026-78161(1)

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

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libwebsockets4.3.5-1 ... 4.3.5-6 (8 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libwebsockets4.3.5-1 ... 4.3.5-5 (6 versions)4.3.5-6—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 109× 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 109 total refreshes for this CVE.

  1. 2026-09-20 08:50 UTCGHSA enrichment
  2. 2026-09-19 19:25 UTCEG score recompute
  3. 2026-09-19 19:25 UTCGHSA enrichment
  4. 2026-09-19 06:37 UTCEG score recompute
  5. 2026-09-19 06:37 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 17:48 UTCGHSA enrichment
  8. 2026-09-18 05:00 UTCEG score recompute
  9. 2026-09-18 05:00 UTCGHSA enrichment
  10. 2026-09-17 16:12 UTCGHSA enrichment
  11. 2026-09-17 03:23 UTCGHSA enrichment
  12. 2026-09-16 14:20 UTCEG score recompute
  13. 2026-09-16 14:20 UTCGHSA enrichment
  14. 2026-09-16 14:08 UTCEPSS rescore
  15. 2026-09-16 05:15 UTCEPSS rescore
  16. 2026-09-16 01:31 UTCGHSA enrichment
  17. 2026-09-15 12:43 UTCEG score recompute
  18. 2026-09-15 12:43 UTCGHSA enrichment
  19. 2026-09-15 03:12 UTCEPSS rescore
  20. 2026-09-15 03:12 UTCEPSS rescore
  21. 2026-09-14 23:45 UTCGHSA enrichment
  22. 2026-09-14 10:10 UTCGHSA enrichment
  23. 2026-09-13 21:22 UTCEG score recompute
  24. 2026-09-13 21:22 UTCGHSA enrichment
  25. 2026-09-13 08:33 UTCGHSA enrichment
Show 75 more
  1. 2026-09-12 19:45 UTCEG score recompute
  2. 2026-09-12 19:45 UTCGHSA enrichment
  3. 2026-09-12 06:56 UTCGHSA enrichment
  4. 2026-09-11 18:07 UTCEG score recompute
  5. 2026-09-11 18:07 UTCGHSA enrichment
  6. 2026-09-11 14:53 UTCEPSS rescore
  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-11 05:19 UTCGHSA enrichment
  9. 2026-09-10 16:31 UTCEG score recompute
  10. 2026-09-10 16:31 UTCGHSA enrichment
  11. 2026-09-10 09:35 UTCEPSS rescore
  12. 2026-09-10 03:12 UTCGHSA enrichment
  13. 2026-09-09 14:23 UTCGHSA enrichment
  14. 2026-09-09 01:35 UTCEG score recompute
  15. 2026-09-09 01:35 UTCGHSA enrichment
  16. 2026-09-08 22:01 UTCEPSS rescore
  17. 2026-09-08 05:42 UTCGHSA enrichment
  18. 2026-09-07 16:53 UTCEG score recompute
  19. 2026-09-07 16:53 UTCGHSA enrichment
  20. 2026-09-07 04:04 UTCGHSA enrichment
  21. 2026-09-06 15:13 UTCEG score recompute
  22. 2026-09-06 15:13 UTCGHSA enrichment
  23. 2026-09-06 13:48 UTCEPSS rescore
  24. 2026-09-06 02:22 UTCEG score recompute
  25. 2026-09-06 02:22 UTCGHSA enrichment
  26. 2026-09-05 13:32 UTCGHSA enrichment
  27. 2026-09-05 00:44 UTCEG score recompute
  28. 2026-09-05 00:44 UTCGHSA enrichment
  29. 2026-09-04 11:55 UTCEG score recompute
  30. 2026-09-04 11:55 UTCGHSA enrichment
  31. 2026-09-04 05:07 UTCEPSS rescore
  32. 2026-09-03 23:07 UTCGHSA enrichment
  33. 2026-09-03 10:18 UTCGHSA enrichment
  34. 2026-09-02 21:29 UTCEG score recompute
  35. 2026-09-02 21:29 UTCGHSA enrichment
  36. 2026-09-02 14:12 UTCEPSS rescore
  37. 2026-09-02 08:41 UTCGHSA enrichment
  38. 2026-09-01 19:52 UTCEG score recompute
  39. 2026-09-01 19:52 UTCGHSA enrichment
  40. 2026-09-01 13:54 UTCEPSS rescore
  41. 2026-09-01 06:41 UTCEG score recompute
  42. 2026-09-01 06:41 UTCGHSA enrichment
  43. 2026-09-01 04:40 UTCEPSS rescore
  44. 2026-09-01 04:40 UTCEPSS rescore
  45. 2026-08-31 17:51 UTCGHSA enrichment
  46. 2026-08-31 04:13 UTCEG score recompute
  47. 2026-08-31 04:13 UTCGHSA enrichment
  48. 2026-08-30 19:18 UTCEPSS rescore
  49. 2026-08-30 19:17 UTCEPSS rescore
  50. 2026-08-30 15:23 UTCGHSA enrichment
  51. 2026-08-30 02:34 UTCEG score recompute
  52. 2026-08-30 02:34 UTCGHSA enrichment
  53. 2026-08-30 01:22 UTCEPSS rescore
  54. 2026-08-29 13:46 UTCGHSA enrichment
  55. 2026-08-29 00:56 UTCEG score recompute
  56. 2026-08-29 00:55 UTCGHSA enrichment
  57. 2026-08-28 21:42 UTCEPSS rescore
  58. 2026-08-28 12:04 UTCGHSA enrichment
  59. 2026-08-27 23:15 UTCEG score recompute
  60. 2026-08-27 23:15 UTCGHSA enrichment
  61. 2026-08-27 14:25 UTCEPSS rescore
  62. 2026-08-27 10:27 UTCGHSA enrichment
  63. 2026-08-26 21:39 UTCEG score recompute
  64. 2026-08-26 21:39 UTCGHSA enrichment
  65. 2026-08-26 14:47 UTCEPSS rescore
  66. 2026-08-26 08:50 UTCGHSA enrichment
  67. 2026-08-25 20:01 UTCEG score recompute
  68. 2026-08-25 20:01 UTCGHSA enrichment
  69. 2026-08-25 13:49 UTCEPSS rescore
  70. 2026-08-25 07:12 UTCGHSA enrichment
  71. 2026-08-24 18:24 UTCEG score recompute
  72. 2026-08-24 18:23 UTCGHSA enrichment
  73. 2026-08-24 18:21 UTCNVD updateCVSS v4 → 5.5
  74. 2026-08-24 17:36 UTCEG score recompute
  75. 2026-08-24 17:36 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78161?
CVE-2026-78161 is a high vulnerability published on August 24, 2026. A vulnerability was found in warmcat libwebsockets 4.5.0. Impacted is the function reportrawcbor of the file lib/misc/lecp.c of the component LECP CBOR Recording. The manipulation results in out-of-bounds write. The attack can be launched remotely. The exploit has been made public and could be…
When was CVE-2026-78161 disclosed?
CVE-2026-78161 was first published in the National Vulnerability Database on August 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-78161 actively exploited?
CVE-2026-78161 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 65.5% of all scored CVEs.
What is the CVSS score of CVE-2026-78161?
CVE-2026-78161 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-78161?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-78161, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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