CVE-2026-73509

HIGHPre-NVD 7.67.6
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 7.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (43rd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
7.6EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.6Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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
7.6HIGHmedium confidence
EG Risk
50
EG Risk 50/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity76% × 45%
Impact severity (EG Severity): CVSS 7.6 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.6): severity, escalated by confirmed exploitation. This CVE's 7.6 is its impact severity (EG Severity), not escalated.

EG Severity
7.6 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-18). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 24, 2026

Last Modified

September 18, 2026

Advisory Details (3)

Auto-updated Aug 13, 2026
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 advisoryMentions a patch (unverified)

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 rangeFix by version rangeDependents
github.com/OpenListTeam/OpenList—
  • every version on: no fix on record
—
github.com/OpenListTeam/OpenList/v3—
  • every version on: no fix on record
—
github.com/OpenListTeam/OpenList/v4—
  • every version up to 4.2.4: fixed in 4.2.4
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 38× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 96 of 102 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 100 are merged into the row they repeat. The 6 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  2. 2026-10-19 06:11 UTCEG score recompute
  3. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  4. 2026-10-18 03:15 UTCEG score recompute
  5. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  6. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  7. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  10. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  11. 2026-10-12 15:39 UTCEG score recompute
  12. 2026-10-11 19:26 UTCEG score recompute
  13. 2026-10-11 16:42 UTCEG score recompute
  14. 2026-10-11 14:01 UTCEG score recompute
  15. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  16. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  17. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  18. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  19. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  20. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  21. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  22. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  23. 2026-10-04 07:41 UTCEG score recompute
  24. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  25. 2026-10-02 19:43 UTCEG score recompute
Show 71 more
  1. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  2. 2026-10-01 04:32 UTCEG score recompute
  3. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  4. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  5. 2026-09-28 04:25 UTCEG score recompute
  6. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  7. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  8. 2026-09-25 09:59 UTCEG score recompute
  9. 2026-09-23 22:16 UTCEG score recompute
  10. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  11. 2026-09-22 22:09 UTCEG score recompute
  12. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  13. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 38th percentile
  14. 2026-09-20 01:39 UTCEG score recompute
  15. 2026-09-18 20:35 UTCEG score recompute
  16. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  17. 2026-09-18 02:56 UTCEG score recompute
  18. 2026-09-17 01:58 UTCEG score recompute
  19. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  20. 2026-09-16 06:38 UTCEG score recompute
  21. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  22. 2026-09-15 09:34 UTCEG score recompute
  23. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  24. 2026-09-14 00:19 UTCEG score recompute
  25. 2026-09-13 02:02 UTCEG score recompute
  26. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  27. 2026-09-11 16:35 UTCEG score recompute
  28. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  29. 2026-09-10 13:33 UTCEG score recompute
  30. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  31. 2026-09-09 08:43 UTCEG score recompute
  32. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  33. 2026-09-07 21:23 UTCEG score recompute
  34. 2026-09-06 19:18 UTCEG score recompute
  35. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  36. 2026-09-05 19:22 UTCEG score recompute
  37. 2026-09-05 06:52 UTCEG score recompute
  38. 2026-09-04 12:44 UTCEG score recompute
  39. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  40. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  41. 2026-09-01 23:15 UTCEG score recompute
  42. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  43. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  44. 2026-08-30 22:31 UTCEG score recompute
  45. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  46. 2026-08-30 11:22 UTCEG score recompute
  47. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  48. 2026-08-30 00:14 UTCEG score recompute
  49. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  50. 2026-08-27 21:06 UTCEG score recompute
  51. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  52. 2026-08-26 21:59 UTCEG score recompute
  53. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  54. 2026-08-25 22:17 UTCEG score recompute
  55. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  56. 2026-08-24 23:18 UTCEG score recompute
  57. 2026-08-24 12:09 UTCEG score recompute
  58. 2026-08-23 02:23 UTCEG score recompute
  59. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  60. 2026-08-22 04:06 UTCEG score recompute
  61. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  62. 2026-08-21 05:44 UTCEG score recompute
  63. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  64. 2026-08-19 20:17 UTCEG score recompute
  65. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  66. 2026-08-18 19:59 UTCEG score recompute
  67. 2026-08-18 13:49 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  68. 2026-08-17 20:56 UTCEG score recompute
  69. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  70. 2026-08-16 22:39 UTCEG score recompute
  71. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 30th percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-73509?
CVE-2026-73509 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-73509 published?
The CVE record for CVE-2026-73509 was published on July 24, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 18, 2026; the record at its source may have been updated since.
Is CVE-2026-73509 actively exploited?
CVE-2026-73509 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73509?
CVE-2026-73509 has a CVSS base score of 7.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73509?
A fix for CVE-2026-73509 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73509 are linked in the Vendor Advisories panel on this page.

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