CVE-2026-58451

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-01. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

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

Horde IMP before 7.0.1 contains a path traversal vulnerability in lib/Compose.php that allows authenticated attackers to read arbitrary files from the server filesystem by embedding traversal sequences after a CKEditor path prefix in img src URLs. Attackers can bypass the stripos() prefix validation by appending sequences such as traversal segments after the matching prefix, causing file_get_contents() to read sensitive files whose contents are then exfiltrated as MIME parts in outgoing email; unauthenticated exploitation is also achievable via CSRF against an active authenticated session.

CVSS v3
6.5
EG Score
6.5(high)
EPSS
30.0%
KEV
Not listed

Published

July 1, 2026

Last Modified

July 2, 2026

Advisory Details (7)

Auto-updated Jul 3, 2026
Patch available. Sources: github_commit, github_pr, github_release.
generic

Full Disclosure: [fulldis] CVE-2026-58451 - Horde Groupware IMP path traversal vuln

http://seclists.org/fulldisclosure/2026/Jul/8
generic

Horde IMP < 7.0.1 Path Traversal via Compose.php img src | Advisories | VulnCheck

https://www.vulncheck.com/advisories/horde-imp-path-traversal-via-compose-php-img-src
generic

IMP - The Horde Project

https://www.horde.org/apps/imp
github_release Patch Available

7.0.1

Patch available: horde/imp v7.0.1

https://github.com/horde/imp/releases/tag/v7.0.1
github_pr Patch Available

fix(security): prevent path traversal in HTML compose img src handler [CVE-2026-58451]

Patch available: horde/imp v7.0.1 (PR #85 merged 2026-07-01)

https://github.com/horde/imp/pull/85
github_commit Patch Available

commit fba972fab72e (horde/imp)

Patch available: horde/imp v7.0.1 (contains commit fba972fab72e)

https://github.com/horde/imp/commit/fba972fab72ee6871e5d56e6390bee38593085de
generic

CVE-2026-58451 - blog.evan.lat

https://blog.evan.lat/posts/CVE-2026-58451/

Vendor Advisories for CVE-2026-58451(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 20× 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.

  1. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 13:11 UTCEG score recompute
  4. 2026-07-06 13:11 UTCGHSA enrichment
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-06 02:23 UTCEPSS rescore
  7. 2026-07-05 14:43 UTCEG score recompute
  8. 2026-07-05 14:43 UTCGHSA enrichment
  9. 2026-07-05 02:31 UTCEPSS rescore
  10. 2026-07-05 02:30 UTCEPSS rescore
  11. 2026-07-04 16:19 UTCEG score recompute
  12. 2026-07-04 16:19 UTCGHSA enrichment
  13. 2026-07-04 06:31 UTCEPSS rescore
  14. 2026-07-04 06:31 UTCEPSS rescore
  15. 2026-07-03 17:55 UTCEG score recompute
  16. 2026-07-03 17:55 UTCGHSA enrichment
  17. 2026-07-02 19:31 UTCEG score recompute
  18. 2026-07-02 19:31 UTCGHSA enrichment
  19. 2026-07-01 21:08 UTCEG score recompute
  20. 2026-07-01 21:08 UTCNVD updatefirst tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-58451?
CVE-2026-58451 is a medium vulnerability published on July 1, 2026. Horde IMP before 7.0.1 contains a path traversal vulnerability in lib/Compose.php that allows authenticated attackers to read arbitrary files from the server filesystem by embedding traversal sequences after a CKEditor path prefix in img src URLs. Attackers can bypass the stripos() prefix…
When was CVE-2026-58451 disclosed?
CVE-2026-58451 was first published in the National Vulnerability Database on July 1, 2026, with the most recent update on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58451 actively exploited?
CVE-2026-58451 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 30.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-58451?
CVE-2026-58451 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-58451?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58451, 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.

Dependency Blast Radius

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