CVE-2023-46729
CRITICALCVE-2023-46729 is a critical-severity (CVSS 9.3) Server-Side Request Forgery (SSRF) vulnerability in @sentry/nextjs. O3 Security confirms whether CVE-2023-46729 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Sentry Next.js vulnerable to SSRF via Next.js SDK tunnel endpoint
Blast Radius
@sentry/nextjsReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects npm packages — download data is not available via public APIs for these ecosystems.
Description
sentry-javascript provides Sentry SDKs for JavaScript. An unsanitized input of Next.js SDK tunnel endpoint allows sending HTTP requests to arbitrary URLs and reflecting the response back to the user. This issue only affects users who have Next.js SDK tunneling feature enabled. The problem has been fixed in version 7.77.0.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | @sentry/nextjs | ≥ 7.26.0&&< 7.77.0 | 7.77.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @sentry/nextjs. 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.
Fix
Update @sentry/nextjs to 7.77.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-46729 is resolved across your whole dependency graph.
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.
How O3 protects you
O3 pinpoints whether CVE-2023-46729 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-2023-46729. 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-2023-46729 in your dependencies?
O3 detects CVE-2023-46729 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.