CVE-2026-73509

HIGHPre-NVD 7.67.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 70% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.6Exploit: None knownExposed: 0

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

OpenList a file list program that supports multiple storage. Prior to 4.2.4, the authenticated /api/fs/batch_rename handler in server/handles/fsbatch.go authorizes only the source directory produced by user.JoinPath(req.SrcDir) and validates renameObject.NewName with checkRelativePath, but does not validate attacker-controlled renameObject.SrcName, supplied as src_name, before concatenating it with the authorized path and passing the result to fs.Rename. A user with rename permission can use traversal segments in src_name to make path normalization select a file outside the authorized directory and configured base path, resulting in cross-user file integrity loss, limited availability impact, and file-existence disclosure through success or error responses. This issue is fixed in version 4.2.4.

CVSS v3
7.6
EG Score
7.6(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity76% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

July 24, 2026

Last Modified

August 13, 2026

Advisory Details (3)

Auto-updated Aug 13, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

v4.2.4

Patch available: OpenListTeam/OpenList v4.2.4

https://github.com/OpenListTeam/OpenList/releases/tag/v4.2.4
github_commit

commit 651da18da4c6 (OpenListTeam/OpenList)

Fix landed in OpenListTeam/OpenList commit 651da18da4c6 — awaiting tagged release

https://github.com/OpenListTeam/OpenList/commit/651da18da4c647d96648d4bb64462baac1c37e04
github Patch Available🟡 PoC Available

Authenticated users can rename files outside their base path via batch rename `src_name` traversal · Advisory · OpenListTeam/OpenList · GitHub

https://github.com/OpenListTeam/OpenList/security/advisories/GHSA-95cv-r8x4-vh75

Vendor Advisories for CVE-2026-73509(1)

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

Affected Packages

(3 across 1 ecosystem)
Go(3)
PackageVulnerable rangeFixed inDependents
github.com/OpenListTeam/OpenList———
github.com/OpenListTeam/OpenList/v3———
github.com/OpenListTeam/OpenList/v4—4.2.4—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-30 00:14 UTCEG score recompute
  3. 2026-08-28 21:42 UTCEPSS rescore
  4. 2026-08-27 21:06 UTCEG score recompute
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-26 21:59 UTCEG score recompute
  7. 2026-08-26 14:47 UTCEPSS rescore
  8. 2026-08-25 22:17 UTCEG score recompute
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-24 23:18 UTCEG score recompute
  11. 2026-08-24 12:09 UTCEG score recompute
  12. 2026-08-23 02:23 UTCEG score recompute
  13. 2026-08-23 00:19 UTCEPSS rescore
  14. 2026-08-22 04:06 UTCEG score recompute
  15. 2026-08-21 23:49 UTCEPSS rescore
  16. 2026-08-21 05:44 UTCEG score recompute
  17. 2026-08-20 22:56 UTCEPSS rescore
  18. 2026-08-19 20:17 UTCEG score recompute
  19. 2026-08-19 17:04 UTCEPSS rescore
  20. 2026-08-18 19:59 UTCEG score recompute
  21. 2026-08-18 13:49 UTCEPSS rescore
  22. 2026-08-18 13:49 UTCEPSS rescore
  23. 2026-08-17 20:56 UTCEG score recompute
  24. 2026-08-17 13:47 UTCEPSS rescore
  25. 2026-08-16 22:39 UTCEG score recompute
Show 8 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 14:56 UTCEPSS rescore
  3. 2026-08-16 11:29 UTCEG score recompute
  4. 2026-08-16 02:15 UTCEPSS rescore
  5. 2026-08-15 02:03 UTCEG score recompute
  6. 2026-08-15 01:31 UTCEPSS rescore
  7. 2026-08-13 15:28 UTCEG score recompute
  8. 2026-08-13 14:52 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-73509?
CVE-2026-73509 is a high vulnerability published on July 24, 2026. OpenList a file list program that supports multiple storage. Prior to 4.2.4, the authenticated /api/fs/batchrename handler in server/handles/fsbatch.go authorizes only the source directory produced by user.JoinPath(req.SrcDir) and validates renameObject.NewName with checkRelativePath, but does not…
When was CVE-2026-73509 disclosed?
CVE-2026-73509 was first published in the National Vulnerability Database on July 24, 2026, with the most recent update on August 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73509 actively exploited?
CVE-2026-73509 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 69.9% of all scored CVEs.
What is the CVSS score of CVE-2026-73509?
CVE-2026-73509 has a CVSS v3 base score of 7.6 (NVD).
How do I remediate CVE-2026-73509?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73509, 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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