CVE-2026-58487

MEDIUMPre-NVD 5.15.1
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 5.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (40th 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
5.1EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 5.1Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, due to unsafe handling of the local-part of registered email addresses, HedgeDoc was vulnerable to stored HTML Injection through its publish and slide views. An attacker could register a specially crafted email address and inject arbitrary HTML into pages viewed by other users. HedgeDoc accepted RFC 5321 quoted-string local-parts in email addresses during registration. The local-part was then reused as the user's display name without escaping and rendered into HTML in multiple places, including publish and slide views as well as the collaborative editor. An attacker could break out of an HTML attribute and inject arbitrary markup into the page. While the deployed Content-Security-Policy prevented straightforward inline JavaScript execution, the injected HTML was still sufficient to alter page content and embed attacker-controlled resources such as cross-origin iframes. This issue was fixed in version 1.11.0.

CVSS v3
5.1
EG Score
5.1MEDIUMmedium confidence
EG Risk
23
EG Risk 23/100

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)
Severity51% × 45%
The EG Score, 5.1 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (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
40th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation none (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 13, 2026

Last Modified

July 15, 2026

Advisory Details (1)

Auto-updated Jul 13, 2026
Fix named in the CVE record. Sources: github.
GitHub advisoryMentions a patch (unverified)

Stored HTML injection via email local-part · Advisory · hedgedoc/hedgedoc · GitHub

https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-6c2w-8w96-3pcv

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 34× 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 138 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 38 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

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

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Frequently asked(5)

What is CVE-2026-58487?
CVE-2026-58487 is a medium-severity vulnerability; its CVE record was published on July 13, 2026. HedgeDoc is an open source, real-time, collaborative, markdown notes application. Prior to version 1.11.0, due to unsafe handling of the local-part of registered email addresses, HedgeDoc was vulnerable to stored HTML Injection through its publish and slide views. An attacker could register a…
When was the CVE record for CVE-2026-58487 published?
The CVE record for CVE-2026-58487 was published on July 13, 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 July 15, 2026; the record at its source may have been updated since.
Is CVE-2026-58487 actively exploited?
CVE-2026-58487 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-58487?
CVE-2026-58487 has a CVSS base score of 5.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-58487?
The CVE record for CVE-2026-58487 names the fix: "This issue was fixed in version 1.11.0."

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