CVE-2023-49097
HIGHCVE-2023-49097 is a high-severity (CVSS 8.1) CWE-640 vulnerability in github.com/zitadel/zitadel. 1 public exploit reference exists, so weaponization risk is real. O3 Security confirms whether CVE-2023-49097 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
ZITADEL vulnerable account takeover via malicious host header injection
Blast Radius
github.com/zitadel/zitadel🐹github.com/zitadel/zitadel🐹github.com/zitadel/zitadelReal-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
ZITADEL is an identity infrastructure system. ZITADEL uses the notification triggering requests Forwarded or X-Forwarded-Host header to build the button link sent in emails for confirming a password reset with the emailed code. If this header is overwritten and a user clicks the link to a malicious site in the email, the secret code can be retrieved and used to reset the users password and take over his account. Accounts with MFA or Passwordless enabled can not be taken over by this attack. This issue has been patched in versions 2.41.6, 2.40.10 and 2.39.9.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/zitadel/zitadel | ≥ 2.39.0&&< 2.39.9 | 2.39.9 |
| 🐹Go | github.com/zitadel/zitadel | ≥ 2.40.0&&< 2.40.10 | 2.40.10 |
| 🐹Go | github.com/zitadel/zitadel | ≥ 2.41.0&&< 2.41.6 | 2.41.6 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/zitadel/zitadel. 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 github.com/zitadel/zitadel to 2.39.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-49097 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-2023-49097 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-2023-49097. 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-2023-49097 in your dependencies?
O3 detects CVE-2023-49097 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.