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HIGH severity

CVE-2021-36753 — bat

HIGHFix: sharkdp/bat@bf2b2df

CVE-2021-36753 is a high-severity (CVSS 7.8) CWE-427 vulnerability in bat. A fix is available for bat — see the affected versions and patch details below.

Uncontrolled Search Path Element in sharkdp/bat

Also known asGHSA-p24j-h477-76q3RUSTSEC-2021-0106
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs27th percentile — riskier than 27% of all scored CVEsHighest risk
0.00%0.29%0.57%0.86%0.2%0.4%Apr 26Aug 26Oct 26

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

How urgent is this, really

CVE-2021-36753 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,386 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🦀bat

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

bat on windows before 0.18.2 executes programs named less.exe from the current working directory. This can lead to unintended code execution.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🦀crates.iobatall versions0.18.2cargo update -p bat --precise 0.18.2

Affected Products

1 product · 1 configurations
Application
batbat_project
< 0.18.2
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update bat to 0.18.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-36753 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

bat on windows before 0.18.2 executes programs named less.exe from the current working directory. This can lead to unintended code execution.
O3 Security · Impact-Aware SCA

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CVE-2021-36753: bat — Fixed in 0.18.2