Your RSA-2048 keys break in 2030. Find every one of them before attackers do.
🐘 Packagist

CVE-2026-31351

MEDIUM

CVE-2026-31351 is a medium-severity (CVSS 4.8) Cross-site Scripting (XSS) vulnerability in feehi/cms. O3 Security confirms whether CVE-2026-31351 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Feehi CMS has an authenticated stored cross-site scripting (XSS) vulnerability via the creation/editing module

Also known asGHSA-cvjh-88c8-2jjx
Published
Apr 6, 2026
Updated
Jul 15, 2026
Affected
1 pkg
Patched
None yet
Exploits
None indexed

Blast Radius

1 pkg affected
🐘feehi/cms

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

Description

An authenticated stored cross-site scripting (XSS) vulnerability in the creation/editing module of Feehi CMS v2.1.1 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the Title parameter.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐘Packagistfeehi/cmsall versionsNo fix

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for feehi/cms. 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. Remediation status

    No patched version of feehi/cms has shipped for CVE-2026-31351 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

  3. Mitigate without a patch

    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-2026-31351 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-2026-31351. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

An authenticated stored cross-site scripting (XSS) vulnerability in the creation/editing module of Feehi CMS v2.1.1 allows attackers to execute arbitrary web scripts or HTML via injecting a crafted payload into the Title parameter.
O3 Security · Impact-Aware SCA

Is CVE-2026-31351 in your dependencies?

O3 detects CVE-2026-31351 across Packagist dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.