CVE-2025-27155 is a medium-severity (CVSS 6.1) Cross-site Scripting (XSS) vulnerability in github.com/matrix-org/pinecone. O3 Security confirms whether CVE-2025-27155 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
In-memory stored Cross-site scripting (XSS) vulnerability in pineconesim
Real-World Exposure
github.com/matrix-org/pineconeReal-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
Pinecone is an experimental overlay routing protocol suite which is the foundation of the current P2P Matrix demos. The Pinecone Simulator (pineconesim) included in Pinecone up to commit ea4c337 is vulnerable to stored cross-site scripting. The payload storage is not permanent and will be wiped when restarting pineconesim.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/matrix-org/pinecone | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/matrix-org/pinecone. 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.
Remediation status
No patched version of github.com/matrix-org/pinecone has shipped for CVE-2025-27155 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
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.
How O3 protects you
O3 pinpoints whether CVE-2025-27155 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-2025-27155. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2025-27155 in your dependencies?
O3 detects CVE-2025-27155 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.