CVE-2026-88940

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-09-10. the CNA's CVSS baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 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: 1%CVSS: 5.3Exploit: Elevated riskExposed: 0

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

knowns through 0.33.0 fails to validate the path query parameter in the workspace browse endpoint, allowing remote attackers to enumerate arbitrary directories on the host filesystem. Attackers can traverse the directory structure to locate project directories and identify targets for further exploitation.

CVSS v3
5.3
EG Score
5.3(high)
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
1%
EPSS %ILE
44%
KEV
Not listed

Published

September 10, 2026

Last Modified

September 11, 2026

Advisory Details (3)

Auto-updated Sep 10, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

knowns through 0.33.0 Arbitrary Directory Enumeration via workspace browse endpoint | Advisories | VulnCheck

https://www.vulncheck.com/advisories/knowns-through-0.33.0-arbitrary-directory-enumeration-via-workspace-browse-endpoint
generic

knowns/internal/server/routes/workspace.go at v0.33.0 · knowns-dev/knowns · GitHub

https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/server/routes/workspace.go#L42-L110
github Patch Available🟡 PoC Available

Multi-Stage Workspace Context Escalation & Sandbox Escape via Bootstrap Gate Bypass and Unbounded Directory Enumeration · Advisory · knowns-dev/knowns · GitHub

https://github.com/knowns-dev/knowns/security/advisories/GHSA-h73x-698r-qrvg

Vendor Advisories for CVE-2026-88940(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 / 51× 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. 2026-09-25 04:19 UTCEG score recompute
  2. 2026-09-25 04:19 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 04:51 UTCEG score recompute
  5. 2026-09-24 04:51 UTCGHSA enrichment
  6. 2026-09-23 17:54 UTCEPSS rescore
  7. 2026-09-23 05:24 UTCEG score recompute
  8. 2026-09-23 05:24 UTCGHSA enrichment
  9. 2026-09-22 16:01 UTCEPSS rescore
  10. 2026-09-22 05:56 UTCEG score recompute
  11. 2026-09-22 05:56 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-21 06:29 UTCEG score recompute
  14. 2026-09-21 06:29 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-20 07:01 UTCEG score recompute
  17. 2026-09-20 07:01 UTCGHSA enrichment
  18. 2026-09-19 07:18 UTCEG score recompute
  19. 2026-09-19 07:18 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-18 07:50 UTCEG score recompute
  22. 2026-09-18 07:50 UTCGHSA enrichment
  23. 2026-09-17 19:32 UTCEPSS rescore
  24. 2026-09-17 08:22 UTCEG score recompute
  25. 2026-09-17 08:22 UTCGHSA enrichment
Show 26 more
  1. 2026-09-16 14:09 UTCEPSS rescore
  2. 2026-09-16 08:51 UTCEG score recompute
  3. 2026-09-16 08:51 UTCGHSA enrichment
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-15 09:17 UTCEG score recompute
  6. 2026-09-15 09:17 UTCGHSA enrichment
  7. 2026-09-15 03:12 UTCEPSS rescore
  8. 2026-09-14 09:49 UTCEG score recompute
  9. 2026-09-14 09:49 UTCGHSA enrichment
  10. 2026-09-13 16:48 UTCEPSS rescore
  11. 2026-09-13 10:18 UTCEG score recompute
  12. 2026-09-13 10:18 UTCGHSA enrichment
  13. 2026-09-12 15:02 UTCEPSS rescore
  14. 2026-09-12 10:51 UTCEG score recompute
  15. 2026-09-12 10:50 UTCGHSA enrichment
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-11 11:18 UTCEG score recompute
  19. 2026-09-11 11:17 UTCGHSA enrichment
  20. 2026-09-10 20:03 UTCEG score recompute
  21. 2026-09-10 20:03 UTCGHSA enrichment
  22. 2026-09-10 17:20 UTCEG score recompute
  23. 2026-09-10 16:55 UTCEG score recompute
  24. 2026-09-10 16:20 UTCEG score recompute
  25. 2026-09-10 15:40 UTCEG score recompute
  26. 2026-09-10 15:39 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-88940?
CVE-2026-88940 is a medium vulnerability published on September 10, 2026. knowns through 0.33.0 fails to validate the path query parameter in the workspace browse endpoint, allowing remote attackers to enumerate arbitrary directories on the host filesystem. Attackers can traverse the directory structure to locate project directories and identify targets for further…
When was CVE-2026-88940 disclosed?
CVE-2026-88940 was first published in the National Vulnerability Database on September 10, 2026, with the most recent update on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-88940 actively exploited?
CVE-2026-88940 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.9% of all scored CVEs.
What is the CVSS score of CVE-2026-88940?
CVE-2026-88940 has a CVSS v4.0 base score of 5.3 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-88940?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-88940, 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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