CVE-2026-53580

HIGHPre-NVD 8.18.1
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (39th 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
8.1EG
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: 8.1Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

Trilium is an open-source hierarchical note-taking application. In versions prior to 0.104.0, the automatic image-download feature accepts file:// URLs in a note's img tags and reads the referenced local file with no path validation, allowing any authenticated user to disclose arbitrary files readable by the Trilium process. When a text note is saved, Trilium scans its HTML for image sources and downloads each external one; because the HTML sanitizer keeps file as an allowed scheme, a source such as file:///etc/passwd is passed straight to a filesystem read and its contents are stored as a note attachment the user can then retrieve. Pointing the same primitive at an unbounded source such as /dev/zero causes uncontrolled memory allocation that crashes the server process. The feature is enabled by default and is reachable through the web UI, the ETAPI, the web clipper, and note imports, requiring only an authenticated session or an ETAPI token. This issue is fixed in version 0.104.0

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
52
EG Risk 52/100

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 (value × EchelonGraph’s weight)
Severity81% × 45%
The EG Score, 8.1 of 10.
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: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

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

The CVE record names the fixed release. 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

August 27, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Aug 27, 2026
Fix named in the CVE record. Sources: github, github_commit.
GitHub commit

commit c417c901dfe4 (TriliumNext/Trilium)

Fix landed in TriliumNext/Trilium commit c417c901dfe4 — awaiting tagged release

https://github.com/TriliumNext/Trilium/commit/c417c901dfe45222c321fab1685f26730cc2068f
GitHub advisoryMentions a patch (unverified)

Arbitrary file disclosure and OOM crash via file:// in note content · Advisory · TriliumNext/Trilium · GitHub

https://github.com/TriliumNext/Trilium/security/advisories/GHSA-3gxr-j6g6-q75c

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 53× 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.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  3. 2026-10-12 15:57 UTCEG score recompute
  4. 2026-10-11 19:40 UTCEG score recompute
  5. 2026-10-11 16:55 UTCEG score recompute
  6. 2026-10-11 14:19 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-10-10 01:45 UTCEG score recompute
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  11. 2026-10-09 02:56 UTCEG score recompute
  12. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-10-08 01:13 UTCEG score recompute
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  15. 2026-10-06 18:52 UTCEG score recompute
  16. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  17. 2026-10-06 07:31 UTCEG score recompute
  18. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  19. 2026-10-05 03:42 UTCEG score recompute
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  21. 2026-10-03 17:34 UTCEG score recompute
  22. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  23. 2026-10-02 18:50 UTCEG score recompute
  24. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  25. 2026-10-01 19:52 UTCEG score recompute
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  1. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-09-30 19:53 UTCEG score recompute
  3. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  4. 2026-09-30 04:53 UTCEG score recompute
  5. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  6. 2026-09-29 03:18 UTCEG score recompute
  7. 2026-09-28 15:55 UTCEG score recompute
  8. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-09-27 17:10 UTCEG score recompute
  10. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  11. 2026-09-26 18:23 UTCEG score recompute
  12. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  13. 2026-09-25 01:10 UTCEG score recompute
  14. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  15. 2026-09-24 02:25 UTCEG score recompute
  16. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-09-22 16:19 UTCEG score recompute
  18. 2026-09-22 04:41 UTCEG score recompute
  19. 2026-09-21 05:27 UTCEG score recompute
  20. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  21. 2026-09-18 19:38 UTCEG score recompute
  22. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  23. 2026-09-17 20:54 UTCEG score recompute
  24. 2026-09-16 21:30 UTCEG score recompute
  25. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  26. 2026-09-16 09:15 UTCEG score recompute
  27. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  28. 2026-09-15 09:24 UTCEG score recompute
  29. 2026-09-13 23:12 UTCEG score recompute
  30. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  31. 2026-09-13 00:28 UTCEG score recompute
  32. 2026-09-12 01:44 UTCEG score recompute
  33. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  34. 2026-09-11 14:22 UTCEG score recompute
  35. 2026-09-10 15:38 UTCEG score recompute
  36. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  37. 2026-09-09 00:37 UTCEG score recompute
  38. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  39. 2026-09-08 03:13 UTCEG score recompute
  40. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  41. 2026-09-06 16:58 UTCEG score recompute
  42. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  43. 2026-09-05 18:13 UTCEG score recompute
  44. 2026-09-04 19:27 UTCEG score recompute
  45. 2026-09-04 08:04 UTCEG score recompute
  46. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  47. 2026-09-02 21:57 UTCEG score recompute
  48. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  49. 2026-09-01 23:12 UTCEG score recompute
  50. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  51. 2026-09-01 11:50 UTCEG score recompute
  52. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  53. 2026-08-31 01:36 UTCEG score recompute
  54. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  55. 2026-08-30 02:52 UTCEG score recompute
  56. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  57. 2026-08-29 04:08 UTCEG score recompute
  58. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  59. 2026-08-28 16:40 UTCEG score recompute
  60. 2026-08-28 15:42 UTCEG score recompute
  61. 2026-08-27 20:26 UTCEG score recompute
  62. 2026-08-27 20:14 UTCEG score recomputeFirst assessed: 8.1 HIGH
  63. 2026-08-27 20:13 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-53580?
CVE-2026-53580 is a high-severity vulnerability; its CVE record was published on August 27, 2026. Trilium is an open-source hierarchical note-taking application. In versions prior to 0.104.0, the automatic image-download feature accepts file:// URLs in a note's img tags and reads the referenced local file with no path validation, allowing any authenticated user to disclose arbitrary files…
When was the CVE record for CVE-2026-53580 published?
The CVE record for CVE-2026-53580 was published on August 27, 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 9, 2026; the record at its source may have been updated since.
Is CVE-2026-53580 actively exploited?
CVE-2026-53580 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53580?
CVE-2026-53580 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-53580?
The CVE record for CVE-2026-53580 names the fix: "This issue is fixed in version 0.104.0".

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