CVE-2026-10650

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-06-03. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: Elevated riskExposed: 0

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

A flaw has been found in warmcat libwebsockets up to 4.5.8. This issue affects the function lws_ssh_parse_plaintext of the file plugins/protocol_lws_ssh_base/sshd.c of the component SSH Protocol Handler. Executing a manipulation of the argument msg_len can lead to resource consumption. The attack may be launched remotely. The exploit has been published and may be used. This patch is called 3f9f0c6ecaf0e6f3f219d30632c5d1f2479d7498. A patch should be applied to remediate this issue.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
55(Attend)
EG Risk 55/100SSVC: 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
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

June 2, 2026

Last Modified

July 22, 2026

Advisory Details (4)

Auto-updated Jun 16, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
github_commit

commit 3f9f0c6ecaf0 (warmcat/libwebsockets)

Fix landed in warmcat/libwebsockets commit 3f9f0c6ecaf0 — awaiting tagged release

https://github.com/warmcat/libwebsockets/commit/3f9f0c6ecaf0e6f3f219d30632c5d1f2479d7498
generic

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

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

pocs/libwebsockets_sshd-parse-ic-unbounded-alloc at main · biniamf/pocs · GitHub

https://github.com/biniamf/pocs/tree/main/libwebsockets_sshd-parse-ic-unbounded-alloc
generic

pocs/libwebsockets_sshd-parse-ic-unbounded-alloc/poc_sshd_unbounded_alloc.py at main · biniamf/pocs · GitHub

https://github.com/biniamf/pocs/blob/main/libwebsockets_sshd-parse-ic-unbounded-alloc/poc_sshd_unbounded_alloc.py

Vendor Advisories for CVE-2026-10650(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libwebsockets4.0.20-2 ... 4.3.5-5 (23 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libwebsockets4.1.6-3 ... 4.3.5-6 (16 versions)——
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, 4.3.5-2, 4.3.5-3, 4.3.5-4, 4.3.5-4.14.3.5-5—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 35× 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 196 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-10650?
CVE-2026-10650 is a medium vulnerability published on June 2, 2026. A flaw has been found in warmcat libwebsockets up to 4.5.8. This issue affects the function lwssshparseplaintext of the file plugins/protocollwssshbase/sshd.c of the component SSH Protocol Handler. Executing a manipulation of the argument msg_len can lead to resource consumption. The attack may be…
When was CVE-2026-10650 disclosed?
CVE-2026-10650 was first published in the National Vulnerability Database on June 2, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-10650 actively exploited?
CVE-2026-10650 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 63.7% of all scored CVEs.
What is the CVSS score of CVE-2026-10650?
CVE-2026-10650 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-10650?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-10650, 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.

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