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MEDIUM severity

CVE-2025-45286

MEDIUM

CVE-2025-45286 is a medium-severity (CVSS 6.1) CWE-80 vulnerability in github.com/mccutchen/go-httpbin. O3 Security confirms whether CVE-2025-45286 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Reflected XSS in go-httpbin due to unrestricted client control over Content-Type

Also known asGHSA-528q-4pgm-wvg2GO-2025-3554
Published
Jan 2, 2026
Updated
Jul 15, 2026
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Jul 15, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Real-World Exposure

2 pkgs affected
🐹github.com/mccutchen/go-httpbin🐹github.com/mccutchen/go-httpbin/v2

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

Description

A cross-site scripting (XSS) vulnerability in mccutchen httpbin v2.17.1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
🐹Gogithub.com/mccutchen/go-httpbinall versions2.18.0
🐹Gogithub.com/mccutchen/go-httpbin/v2all versions2.18.0

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/mccutchen/go-httpbin. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update github.com/mccutchen/go-httpbin to 2.18.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-45286 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.

  4. How O3 protects you

    O3 pinpoints whether CVE-2025-45286 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to CVE-2025-45286. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

A cross-site scripting (XSS) vulnerability in mccutchen httpbin v2.17.1 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.
O3 Security · Impact-Aware SCA

Is CVE-2025-45286 in your dependencies?

O3 detects CVE-2025-45286 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

CVE-2025-45286: go-httpbin Cross-Site… | O3 Security