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 — 5 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
34%
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.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 34× in last 7d / 34× 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.

  1. 2026-08-30 02:34 UTCEG score recompute
  2. 2026-08-30 02:34 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-29 13:46 UTCGHSA enrichment
  5. 2026-08-29 00:56 UTCEG score recompute
  6. 2026-08-29 00:55 UTCGHSA enrichment
  7. 2026-08-28 21:42 UTCEPSS rescore
  8. 2026-08-28 12:04 UTCGHSA enrichment
  9. 2026-08-27 23:15 UTCEG score recompute
  10. 2026-08-27 23:15 UTCGHSA enrichment
  11. 2026-08-27 14:25 UTCEPSS rescore
  12. 2026-08-27 10:27 UTCGHSA enrichment
  13. 2026-08-26 21:39 UTCEG score recompute
  14. 2026-08-26 21:39 UTCGHSA enrichment
  15. 2026-08-26 14:47 UTCEPSS rescore
  16. 2026-08-26 08:50 UTCGHSA enrichment
  17. 2026-08-25 20:01 UTCEG score recompute
  18. 2026-08-25 20:01 UTCGHSA enrichment
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-25 07:12 UTCGHSA enrichment
  21. 2026-08-24 18:24 UTCEG score recompute
  22. 2026-08-24 18:23 UTCGHSA enrichment
  23. 2026-08-24 18:21 UTCNVD updateCVSS v4 → 5.5
  24. 2026-08-24 17:36 UTCEG score recompute
  25. 2026-08-24 17:36 UTCGHSA enrichment
Show 9 more
  1. 2026-08-24 17:36 UTCMITRE cvelistV5CVSS v4 → 6.9
  2. 2026-08-24 16:46 UTCGHSA enrichment
  3. 2026-08-24 14:26 UTCEG score recompute
  4. 2026-08-24 14:26 UTCGHSA enrichment
  5. 2026-08-24 14:18 UTCEPSS rescore
  6. 2026-08-24 01:38 UTCEG score recompute
  7. 2026-08-24 01:37 UTCNVD updateCVSS v4 → 5.5
  8. 2026-08-24 00:56 UTCEG score recompute
  9. 2026-08-24 00:55 UTCMITRE cvelistV5first tracked

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 66.5% 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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