CVE-2026-77798

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-09-24. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.5Exploit: 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.

Velociraptor contains a deadlock condition that may be triggered by authenticated users. The issue stems from a lock management bug in the user management module.

CVSS v3
6.5
EG Score
6.5MEDIUMhigh confidence
EG Risk
34
EG Risk 34/100CISA 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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or 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
0.2%
EPSS %ILE
8th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or 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 (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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 24, 2026

Last Modified

September 24, 2026

Advisory Details (1)

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

commit b64d915422da (Velocidex/velociraptor)

Fix landed in Velocidex/velociraptor commit b64d915422da — awaiting tagged release

https://github.com/Velocidex/velociraptor/commit/b64d915422da2e8366781bea2b5c5e6808df829c

Vendor Advisories for CVE-2026-77798(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 20× in last 7d / 33× 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. 2026-10-05 00:02 UTCEG score recompute
  2. 2026-10-05 00:02 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 01:57 UTCEG score recompute
  5. 2026-10-04 01:57 UTCGHSA enrichment
  6. 2026-10-03 14:26 UTCEPSS rescore
  7. 2026-10-03 03:53 UTCEG score recompute
  8. 2026-10-03 03:53 UTCGHSA enrichment
  9. 2026-10-02 05:46 UTCEG score recompute
  10. 2026-10-02 05:46 UTCGHSA enrichment
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-10-01 07:42 UTCEG score recompute
  13. 2026-10-01 07:42 UTCGHSA enrichment
  14. 2026-09-30 09:38 UTCEG score recompute
  15. 2026-09-30 09:38 UTCGHSA enrichment
  16. 2026-09-29 15:24 UTCEPSS rescore
  17. 2026-09-29 11:34 UTCEG score recompute
  18. 2026-09-29 11:33 UTCGHSA enrichment
  19. 2026-09-28 13:52 UTCEPSS rescore
  20. 2026-09-28 13:28 UTCGHSA enrichment
  21. 2026-09-27 15:23 UTCEG score recompute
  22. 2026-09-27 15:23 UTCGHSA enrichment
  23. 2026-09-27 13:48 UTCEPSS rescore
  24. 2026-09-26 17:19 UTCEG score recompute
  25. 2026-09-26 17:19 UTCGHSA enrichment
Show 8 more
  1. 2026-09-26 15:59 UTCEPSS rescore
  2. 2026-09-26 00:28 UTCEPSS rescore
  3. 2026-09-25 19:14 UTCGHSA enrichment
  4. 2026-09-24 21:01 UTCEG score recompute
  5. 2026-09-24 21:01 UTCGHSA enrichment
  6. 2026-09-24 14:33 UTCEG score recompute
  7. 2026-09-24 13:54 UTCEG score recompute
  8. 2026-09-24 13:53 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77798?
CVE-2026-77798 is a medium vulnerability published on September 24, 2026. Velociraptor contains a deadlock condition that may be triggered by authenticated users. The issue stems from a lock management bug in the user management module.
When was CVE-2026-77798 disclosed?
CVE-2026-77798 was first published on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77798 actively exploited?
CVE-2026-77798 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-77798?
CVE-2026-77798 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-77798?
An upstream fix for CVE-2026-77798 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-2026-77798 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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