CVE-2026-58451

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM 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 — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 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(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

July 1, 2026

Last Modified

July 14, 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.

Affected Packages

(2 across 2 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
php-horde-imp6.2.27-2, 6.2.27-2+deb11u1, 6.2.27-3, 6.2.27-3.1——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
php-horde-imp6.2.27-3, 6.2.27-3.1——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 56× 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 167 total refreshes for this CVE.

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

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 14, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 65.6% of all scored CVEs.
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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