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MEDIUM severity

CVE-2025-67124 — miniserve

MEDIUM

CVE-2025-67124 is a medium-severity (CVSS 6.8) CWE-59 vulnerability in miniserve. A fix is available for miniserve — see the affected versions and patch details below.

miniserve affected by a TOCTOU and symlink race vulnerability

Also known asGHSA-mxc8-4jqf-368q
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

  • CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-67124.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs26th percentile — riskier than 26% of all scored CVEsHighest risk
0.00%0.28%0.55%0.83%0.0%0.3%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🦀miniserve

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects crates.io packages — download data is not available via public APIs for these ecosystems.

Description

A TOCTOU and symlink race in svenstaro/miniserve 0.32.0 upload finalization (when uploads are enabled) can allow an attacker to overwrite arbitrary files outside the intended upload/document root in deployments where the attacker can create/replace filesystem entries in the upload destination directory (e.g., shared writable directory/volume).

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🦀crates.iominiserveall versions0.32.0cargo update -p miniserve --precise 0.32.0

Affected Products

1 product · 1 configurations
Application
miniservesvenstaro
1 version
0.32.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for miniserve, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update miniserve to 0.32.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-67124 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

A TOCTOU and symlink race in svenstaro/miniserve 0.32.0 upload finalization (when uploads are enabled) can allow an attacker to overwrite arbitrary files outside the intended upload/document root in deployments where the attacker can create/replace filesystem entries in the upload destination directory (e.g., shared writable directory/volume).
O3 Security · Impact-Aware SCA

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CVE-2025-67124: miniserve — Fixed in 0.32.0