CVE-2026-58487

MEDIUMPre-NVD 5.15.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 59% 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
5.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.1Exploit: None knownExposed: 0

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

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
5.1(medium)
EG Risk
23(Track)
EG Risk 23/100SSVC: 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
Severity51% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
41%
KEV
Not listed

Published

July 13, 2026

Last Modified

July 15, 2026

Advisory Details (1)

Auto-updated Jul 13, 2026
Patch available. Sources: github.
github Patch Available

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 9× in last 7d / 39× 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.

Showing the most recent 100 of 110 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 05:00 UTCEG score recompute
  3. 2026-09-17 19:31 UTCEPSS rescore
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  11. 2026-09-11 14:53 UTCEPSS rescore
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  15. 2026-09-07 16:01 UTCEPSS rescore
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  1. 2026-08-28 21:42 UTCEPSS rescore
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  7. 2026-08-25 13:49 UTCEPSS rescore
  8. 2026-08-24 20:09 UTCEG score recompute
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  18. 2026-08-18 13:48 UTCEPSS rescore
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  22. 2026-08-16 14:56 UTCEPSS rescore
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  25. 2026-08-15 01:30 UTCEPSS rescore
  26. 2026-08-14 18:00 UTCEG score recompute
  27. 2026-08-13 22:00 UTCEPSS rescore
  28. 2026-08-12 19:59 UTCEG score recompute
  29. 2026-08-12 13:51 UTCEPSS rescore
  30. 2026-08-11 20:59 UTCEG score recompute
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  38. 2026-08-06 13:47 UTCEPSS rescore
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  40. 2026-08-05 19:17 UTCEPSS rescore
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  42. 2026-08-04 15:10 UTCEPSS rescore
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  45. 2026-08-03 10:36 UTCEPSS rescore
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  47. 2026-08-02 02:27 UTCEPSS rescore
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  49. 2026-08-01 04:16 UTCEPSS rescore
  50. 2026-07-31 07:14 UTCEG score recompute
  51. 2026-07-30 16:28 UTCEPSS rescore
  52. 2026-07-30 08:13 UTCEG score recompute
  53. 2026-07-30 01:30 UTCEPSS rescore
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  56. 2026-07-28 15:37 UTCEPSS rescore
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  58. 2026-07-27 14:14 UTCEPSS rescore
  59. 2026-07-27 10:51 UTCEG score recompute
  60. 2026-07-26 14:54 UTCEPSS rescore
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  63. 2026-07-25 14:18 UTCEPSS rescore
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  69. 2026-07-23 03:21 UTCEG score recompute
  70. 2026-07-22 14:08 UTCEPSS rescore
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  72. 2026-07-21 15:25 UTCEPSS rescore
  73. 2026-07-21 15:25 UTCEPSS rescore
  74. 2026-07-20 17:08 UTCEPSS rescore
  75. 2026-07-19 14:31 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-58487?
CVE-2026-58487 is a medium vulnerability 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 CVE-2026-58487 disclosed?
CVE-2026-58487 was first published in the National Vulnerability Database on July 13, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58487 actively exploited?
CVE-2026-58487 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 58.7% of all scored CVEs.
What is the CVSS score of CVE-2026-58487?
CVE-2026-58487 has a CVSS v3 base score of 5.1 (NVD).
How do I remediate CVE-2026-58487?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58487, 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.

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