CVE-2026-78161

HIGHPre-NVD 7.37.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Trending — 5 sources updated this weekElevated
7.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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
7.3HIGHmedium confidence
EG Risk
64
EG Risk 64/100

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 (value × EchelonGraph’s weight)
Severity73% × 45%
The EG Score, 7.3 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
32nd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 24, 2026

Last Modified

October 12, 2026

Advisory Details (4)

Auto-updated Aug 24, 2026
Patch available. Sources: github_commit.
Web page

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
Web page

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
Web page

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.

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibwebsockets15 (3.2.1-3ubuntu0.1~esm2) @ focal2026-10-12ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libwebsockets4.3.5-1, 4.3.5-1+deb13u1
  • every version up to 4.3.5-1+deb13u2: fixed in 4.3.5-1+deb13u2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libwebsockets4.3.5-1 ... 4.3.5-5 (6 versions)
  • every version up to 4.3.5-6: fixed in 4.3.5-6
—

Weakness Classification(2)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 21× in last 7d / 119× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 206 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 106 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  2. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  3. 2026-10-12 16:30 UTCVendor advisory
  4. 2026-10-12 16:29 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  5. 2026-10-12 16:25 UTCNVD updateCVSS v4 → 5.5
  6. 2026-10-12 15:37 UTCEG score recompute
  7. 2026-10-11 19:23 UTCEG score recompute
  8. 2026-10-11 16:39 UTCEG score recompute
  9. 2026-10-11 13:57 UTCEG score recompute
  10. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  12. 2026-10-10 13:17 UTCEG score recompute
  13. 2026-10-10 13:17 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  14. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  15. 2026-10-09 05:02 UTCEG score recompute
  16. 2026-10-09 05:02 UTCVendor advisory
  17. 2026-10-09 05:02 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  18. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  19. 2026-10-08 04:19 UTCEG score recompute
  20. 2026-10-08 04:19 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  21. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-10-07 05:31 UTCVendor advisory
  23. 2026-10-07 05:31 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  24. 2026-10-06 16:42 UTCEG score recompute
  25. 2026-10-06 16:42 UTCVendor advisory
Show 75 more
  1. 2026-10-06 16:42 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  2. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  3. 2026-10-06 02:57 UTCEG score recompute
  4. 2026-10-06 02:57 UTCVendor advisory
  5. 2026-10-06 02:57 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  6. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  7. 2026-10-05 09:32 UTCEG score recompute
  8. 2026-10-05 09:32 UTCVendor advisory
  9. 2026-10-05 09:32 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  10. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-04 20:44 UTCVendor advisory
  12. 2026-10-04 20:44 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  13. 2026-10-04 05:22 UTCVendor advisory
  14. 2026-10-04 05:22 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  15. 2026-10-03 16:34 UTCEG score recompute
  16. 2026-10-03 16:34 UTCVendor advisory
  17. 2026-10-03 16:34 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  18. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  19. 2026-10-03 01:42 UTCEG score recompute
  20. 2026-10-03 01:42 UTCVendor advisory
  21. 2026-10-03 01:42 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  22. 2026-10-02 12:54 UTCVendor advisory
  23. 2026-10-02 12:54 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  24. 2026-10-01 22:43 UTCEG score recompute
  25. 2026-10-01 22:43 UTCVendor advisory
  26. 2026-10-01 22:43 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  27. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  28. 2026-10-01 09:08 UTCVendor advisory
  29. 2026-10-01 09:08 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  30. 2026-09-30 20:20 UTCEG score recompute
  31. 2026-09-30 20:20 UTCVendor advisory
  32. 2026-09-30 20:20 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  33. 2026-09-30 07:20 UTCEG score recompute
  34. 2026-09-30 07:20 UTCVendor advisory
  35. 2026-09-30 07:20 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  36. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  37. 2026-09-29 05:15 UTCEG score recompute
  38. 2026-09-29 05:15 UTCVendor advisory
  39. 2026-09-29 05:15 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  40. 2026-09-28 16:27 UTCEG score recompute
  41. 2026-09-28 16:27 UTCVendor advisory
  42. 2026-09-28 16:27 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  43. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  44. 2026-09-28 03:23 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  45. 2026-09-27 14:34 UTCEG score recompute
  46. 2026-09-27 14:34 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  47. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  48. 2026-09-27 00:49 UTCEG score recompute
  49. 2026-09-27 00:49 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  50. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  51. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  52. 2026-09-25 17:14 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  53. 2026-09-25 04:25 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  54. 2026-09-24 15:36 UTCEG score recompute
  55. 2026-09-24 15:36 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  56. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  57. 2026-09-24 02:32 UTCEG score recompute
  58. 2026-09-24 02:32 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  59. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  60. 2026-09-23 13:43 UTCEG score recompute
  61. 2026-09-23 13:43 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  62. 2026-09-23 00:54 UTCEG score recompute
  63. 2026-09-23 00:54 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  64. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  65. 2026-09-22 12:06 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  66. 2026-09-21 23:17 UTCEG score recompute
  67. 2026-09-21 23:17 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  68. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  69. 2026-09-21 10:28 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  70. 2026-09-20 21:39 UTCEG score recompute
  71. 2026-09-20 21:39 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  72. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  73. 2026-09-20 08:50 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3
  74. 2026-09-19 19:25 UTCEG score recompute
  75. 2026-09-19 19:25 UTCGHSA enrichmentGHSA-83xp-6qr9-g946 · GitHub CVSS 7.3

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Frequently asked(5)

What is CVE-2026-78161?
CVE-2026-78161 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-78161 published?
The CVE record for CVE-2026-78161 was published on August 24, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 12, 2026; the record at its source may have been updated since.
Is CVE-2026-78161 actively exploited?
CVE-2026-78161 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-78161?
CVE-2026-78161 has a CVSS base score of 7.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-78161?
A fix for CVE-2026-78161 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-78161 are linked in the Vendor Advisories panel on this page.

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