CVE-2026-54910

HIGHPre-NVD 7.77.7
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (31st 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

Also known asEUVD-2026-45957 (ENISA EUVD) · GHSA-vvp7-h4fj-m28w (GitHub Security Advisories)Source: ENISA EUVD

7.7EG
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: 0.4%CVSS: 7.7Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to version 1.4.3-beta, the subtitlesHandler endpoint (GET /api/media/subtitles) accepts two user-controlled query parameters: path and name, both of which are used in filesystem operations without sanitization, creating two independent path traversal vectors. The primary vector is the path parameter: it is passed directly to idx.GetRealPath() without calling SanitizeUserPath(), allowing an attacker to escape the storage root and set parentDir to any directory on the host. No existing anchor file is required. The secondary vector is the name parameter: it is joined with parentDir via filepath.Join(parentDir, name) without stripping directory components, allowing traversal relative to any resolved parentDir. Any authenticated user (regardless of role or permissions) can exploit either vector to read any text file readable by the server process, including /etc/passwd, SSH keys, database credentials, and JWT signing keys. Version 1.4.3-beta patches the issue.

CVSS v3
7.7
EG Score
7.7HIGHmedium confidence
EG Risk
51
EG Risk 51/100

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)
Severity77% × 45%
Impact severity (EG Severity): CVSS 7.7 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
0.4%
EPSS %ILE
31st
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 (7.7): severity, escalated by confirmed exploitation. This CVE's 7.7 is its impact severity (EG Severity), not escalated.

EG Severity
7.7 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
0.4% within 30 daysSource: FIRST EPSS. 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 20, 2026

Last Modified

October 24, 2026

Advisory Details (2)

Auto-updated Jul 21, 2026
Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)

Path traversal in subtitle handler allows any authenticated user to read arbitrary files · Advisory · gtsteffaniak/filebrowser · GitHub

https://github.com/gtsteffaniak/filebrowser/security/advisories/GHSA-vvp7-h4fj-m28w
GitHub commit

commit f3f4bbe80cb5 (gtsteffaniak/filebrowser)

Fix landed in gtsteffaniak/filebrowser commit f3f4bbe80cb5 — awaiting tagged release

https://github.com/gtsteffaniak/filebrowser/commit/f3f4bbe80cb569d664174aea874d7bfa008c3b5a

Vendor Advisories for CVE-2026-54910(1)

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

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFix by version rangeDependents
github.com/gtsteffaniak/filebrowser/backend—
  • every version up to 0.0.0-20260608182036-f3f4bbe80cb5: fixed in 0.0.0-20260608182036-f3f4bbe80cb5
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 42× 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 100 of 150 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. None are among the latest 100 rows. The 50 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  2. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  3. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  4. 2026-10-25 14:19 UTCEG score recompute
  5. 2026-10-24 20:27 UTCEG score recompute
  6. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  7. 2026-10-24 15:05 UTCEG score recompute
  8. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  9. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  10. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  11. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  12. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  13. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  14. 2026-10-18 03:30 UTCEG score recompute
  15. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  16. 2026-10-17 03:40 UTCEG score recompute
  17. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  18. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  19. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  20. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  21. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  22. 2026-10-12 15:56 UTCEG score recompute
  23. 2026-10-11 19:39 UTCEG score recompute
  24. 2026-10-11 16:54 UTCEG score recompute
  25. 2026-10-11 14:17 UTCEG score recompute
Show 75 more
  1. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  2. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  3. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  4. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  5. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  6. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  7. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  8. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  9. 2026-10-04 14:57 UTCEG score recompute
  10. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  11. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  12. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  13. 2026-10-01 07:45 UTCEG score recompute
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  15. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  16. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  17. 2026-09-28 06:23 UTCEG score recompute
  18. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  19. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  20. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  21. 2026-09-24 03:29 UTCEG score recompute
  22. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  23. 2026-09-23 01:43 UTCEG score recompute
  24. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  26. 2026-09-18 03:58 UTCEG score recompute
  27. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  28. 2026-09-17 05:15 UTCEG score recompute
  29. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  30. 2026-09-16 12:48 UTCEG score recompute
  31. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  32. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  33. 2026-09-14 04:24 UTCEG score recompute
  34. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  35. 2026-09-13 03:20 UTCEG score recompute
  36. 2026-09-11 21:52 UTCEG score recompute
  37. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  38. 2026-09-11 09:29 UTCEG score recompute
  39. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  40. 2026-09-09 11:58 UTCEG score recompute
  41. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  42. 2026-09-07 22:57 UTCEG score recompute
  43. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  44. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  45. 2026-09-05 21:58 UTCEG score recompute
  46. 2026-09-05 09:35 UTCEG score recompute
  47. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  48. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  49. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  50. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  51. 2026-08-31 03:54 UTCEG score recompute
  52. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  53. 2026-08-30 02:38 UTCEG score recompute
  54. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  55. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  56. 2026-08-28 01:41 UTCEG score recompute
  57. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  58. 2026-08-26 22:10 UTCEG score recompute
  59. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  60. 2026-08-25 20:13 UTCEG score recompute
  61. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  62. 2026-08-24 18:59 UTCEG score recompute
  63. 2026-08-23 01:09 UTCEG score recompute
  64. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  65. 2026-08-22 00:23 UTCEG score recompute
  66. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  67. 2026-08-20 23:35 UTCEG score recompute
  68. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  69. 2026-08-19 22:50 UTCEG score recompute
  70. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  71. 2026-08-18 19:36 UTCEG score recompute
  72. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  73. 2026-08-17 23:56 UTCEG score recompute
  74. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  75. 2026-08-16 23:10 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-54910?
CVE-2026-54910 is a high-severity vulnerability; its CVE record was published on July 20, 2026. FileBrowser Quantum is a free, self-hosted, web-based file manager. Prior to version 1.4.3-beta, the subtitlesHandler endpoint (GET /api/media/subtitles) accepts two user-controlled query parameters: path and name, both of which are used in filesystem operations without sanitization, creating two…
When was the CVE record for CVE-2026-54910 published?
The CVE record for CVE-2026-54910 was published on July 20, 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 October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-54910 actively exploited?
CVE-2026-54910 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (31st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54910?
CVE-2026-54910 has a CVSS base score of 7.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54910?
A fix for CVE-2026-54910 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54910 are linked in the Vendor Advisories panel on this page.

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