CVE-2022-38580 is a critical-severity (CVSS 9.8) Server-Side Request Forgery (SSRF) vulnerability in github.com/zalando/skipper. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for github.com/zalando/skipper — see the affected versions and patch details below.
Skipper vulnerable to SSRF via X-Skipper-Proxy
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- A successful exploit gives an attacker total control of the affected component, not partial access.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2022-38580.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
github.com/zalando/skipperReal-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
Impact
Skipper prior to version v0.13.236 is vulnerable to server-side request forgery (SSRF). An attacker can exploit a vulnerable version of proxy to access the internal metadata server or other unauthenticated URLs by adding an specific header (X-Skipper-Proxy) to the http request.
Patches
The problem was patched in version https://github.com/zalando/skipper/releases/tag/v0.13.237.
Users need to upgrade to skipper >=v0.13.237.
Workarounds
Use dropRequestHeader("X-Skipper-Proxy") filter
References
https://github.com/zalando/skipper/releases/tag/v0.13.237
For more information
If you have any questions or comments about this advisory:
- Open an issue in https://github.com/zalando/skipper/issues/new/choose
- Chat with us in slack: https://app.slack.com/client/T029RQSE6/C82Q5JNH5
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/zalando/skipper | all versions | 0.13.237go get github.com/zalando/skipper@v0.13.237 |
Affected Products
skipperzalandoResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
X-Skipper-Proxy v0.13.237 - Server Side Request Forgery (SSRF)
by Hosein Vita · Mar 28, 2023
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/zalando/skipper, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/zalando/skipper to 0.13.237 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-38580 is resolved across your whole dependency graph.
Workarounds
Restrict outbound requests from the affected component to an allowlist of hosts, block access to link-local and internal address ranges at the network layer, and require authentication on internal services so a forged request cannot reach them unauthenticated.
Frequently Asked Questions
Is CVE-2022-38580 in your dependencies?
Find it across Go, including transitive dependencies.