CVE catalog
CVE-2026-58451
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 sequence
- Severity
- High · CVSS 7.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.56% · Oct 25, 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 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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | php-horde-imp | sid | 6.2.27-3.1 | vulnerable |
| Debian | php-horde-imp | bookworm | 6.2.27-3 | vulnerable |
| Cpe | php-horde-imp | Not reported | Not reported | vulnerable |
| Ubuntu | php-horde-imp | 16.04 | 6.2.10-1 | vulnerable |
| Ubuntu | php-horde-imp | 16.04 | 6.2.11-1 | vulnerable |
| Ubuntu | php-horde-imp | 16.04 | 6.2.12-1 | vulnerable |
| Ubuntu | php-horde-imp | 16.04 | 6.2.12-1ubuntu1 | vulnerable |
| Ubuntu | php-horde-imp | 18.04 | 6.2.20-1 | vulnerable |
| Ubuntu | php-horde-imp | 18.04 | 6.2.21-1 | vulnerable |
| Ubuntu | php-horde-imp | 18.04 | 6.2.21-1ubuntu1 | vulnerable |
Fixed-version evidence
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [php-horde-imp]Affected
Details (2)
6.2.27-3· all · bookwormAffected
nvd · php-horde-imp · debian · bookworm; nvd · php-horde-imp · debian · 12
6.2.27-3· all · bookwormAffected
nvd · php-horde-imp · debian · bookworm; nvd · php-horde-imp · debian · 12
Observed:
References
- [http://seclists.org/fulldisclosure/2026/Jul/8]
- [https://blog.evan.lat/posts/CVE-2026-58451/]
- [https://github.com/horde/imp/commit/fba972fab72ee6871e5d56e6390bee38593085de]
- [https://github.com/horde/imp/pull/85]
- [https://github.com/horde/imp/releases/tag/v7.0.1]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-58451]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-58451]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-58451]
- [https://security-tracker.debian.org/tracker/CVE-2026-58451]
- [https://www.horde.org/apps/imp]
- [https://www.vulncheck.com/advisories/horde-imp-path-traversal-via-compose-php-img-src]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]