CVE-2026-19781

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-15. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

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

Ashlar-Vellum Cobalt VS File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of VS files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28173.

CVSS v3
7.8
EG Score
7.8(high)
EG Risk
35(Track)
EG Risk 35/100SSVC: Track

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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 18, 2026

Advisory Details (1)

Auto-updated Sep 15, 2026
Patch available.
generic Patch Available

ZDI-26-587 - TrendAI™ Zero Day Initiative™ (ZDI)

https://www.zerodayinitiative.com/advisories/ZDI-26-587/

Vendor Advisories for CVE-2026-19781(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 24× in last 7d / 24× 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. 2026-09-21 03:07 UTCEG score recompute
  2. 2026-09-21 03:07 UTCGHSA enrichment
  3. 2026-09-20 15:56 UTCGHSA enrichment
  4. 2026-09-20 04:45 UTCGHSA enrichment
  5. 2026-09-19 17:35 UTCEG score recompute
  6. 2026-09-19 17:35 UTCGHSA enrichment
  7. 2026-09-19 06:24 UTCEG score recompute
  8. 2026-09-19 06:24 UTCGHSA enrichment
  9. 2026-09-18 19:27 UTCEPSS rescore
  10. 2026-09-18 19:14 UTCGHSA enrichment
  11. 2026-09-18 17:40 UTCGHSA enrichment
  12. 2026-09-18 06:30 UTCEG score recompute
  13. 2026-09-18 06:30 UTCGHSA enrichment
  14. 2026-09-17 19:19 UTCGHSA enrichment
  15. 2026-09-17 06:23 UTCGHSA enrichment
  16. 2026-09-16 19:07 UTCEG score recompute
  17. 2026-09-16 19:07 UTCGHSA enrichment
  18. 2026-09-16 14:07 UTCEPSS rescore
  19. 2026-09-16 07:57 UTCEG score recompute
  20. 2026-09-16 07:56 UTCGHSA enrichment
  21. 2026-09-15 20:42 UTCEG score recompute
  22. 2026-09-15 19:37 UTCEG score recompute
  23. 2026-09-15 18:23 UTCEG score recompute
  24. 2026-09-15 18:22 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-19781?
CVE-2026-19781 is a high vulnerability published on September 15, 2026. Ashlar-Vellum Cobalt VS File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is required to exploit this vulnerability in that the target…
When was CVE-2026-19781 disclosed?
CVE-2026-19781 was first published in the National Vulnerability Database on September 15, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19781 actively exploited?
CVE-2026-19781 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 93.0% of all scored CVEs.
What is the CVSS score of CVE-2026-19781?
CVE-2026-19781 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-19781?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19781, 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

Explore the affected products and dependency analysis for CVE-2026-19781

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