Minder's Github Webhook Handler vulnerable to denial of service from un-validated requests
Priority HIGH 72CWE-400Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.
Summary
Minder's `HandleGithubWebhook` is susceptible to a denial of service attack from an untrusted HTTP request. The vulnerability exists before the request has been validated, and as such the request is still untrusted at the point of failure. This allows an attacker with the ability to send requests to `HandleGithubWebhook` to crash the Minder controlplane and deny other users from using it. This vulnerability is fixed in 0.0.48.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00593 48th percentileScored 2026-11-07
Fix Fixed minder (stacklok): 0.0.48github.com/stacklok/minder (Go): 0.0.48
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| stacklok | minder | before 0.0.48 | 0.0.48 | Patch available | CNA |
| — | github.com/stacklok/minder (Go) | before 0.0.48 | 0.0.48 | Patch available | GHSA-9c5w-9q3f-3hv7 |
- minder Vendorstacklok Affected before 0.0.48 Fixed in 0.0.48 Patch available CNA
- github.com/stacklok/minder (Go) Vendor— Affected before 0.0.48 Fixed in 0.0.48 Patch available GHSA-9c5w-9q3f-3hv7
Remediation
- Fix · CNA minder (stacklok) Fixed in 0.0.48
- Fix · GHSA-9c5w-9q3f-3hv7 github.com/stacklok/minder (Go) Fixed in 0.0.48 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2024-34084
- 2026-10-03 Alias added: GHSA-9c5w-9q3f-3hv7
References
Other 7
- https://github.com/stacklok/minder/security/advisories/GHSA-9c5w-9q3f-3hv7
- https://github.com/stacklok/minder/commit/3e5a527d2f1b535159206161d1d519602c75bd0d
- https://github.com/stacklok/minder
- https://github.com/stacklok/minder/blob/ee66f6c0763212503c898cfefb65ce1450c7f5ac/internal/controlplane/handlers_githubwebhooks.go#L213-L218
- https://github.com/stacklok/minder/blob/ee66f6c0763212503c898cfefb65ce1450c7f5ac/internal/controlplane/handlers_githubwebhooks.go#L337-L342
- https://github.com/stacklok/minder/blob/ee66f6c0763212503c898cfefb65ce1450c7f5ac/internal/controlplane/handlers_githubwebhooks.go#L367-L377
- https://github.com/stacklok/minder/blob/ee66f6c0763212503c898cfefb65ce1450c7f5ac/internal/controlplane/handlers_githubwebhooks_test.go#L278-L283
More stacklok vulnerabilities
- TI-2026-41912 ToolHive: containerized MCP servers can reach host services via host.docker.internal, enabling lateral movement CVSS 3.1HIGH 8.8
- TI-2026-41911 ToolHive: SSRF in remote MCP server authentication discovery (host-side, bypasses container isolation) CVSS 3.1MEDIUM 4.7
- TI-2024-25220 Denial of service from maliciously configured Git repository in Minder CVSS 3.1MEDIUM 5.7
- TI-2024-23307 Denial of service of Minder Server from maliciously crafted GitHub attestations CVSS 3.1MEDIUM 5.3
- TI-2024-23266 Stacklok Minder vulnerable to denial of service from maliciously crafted templates CVSS 3.1MEDIUM 5.3
- TI-2024-23259 Denial of service of Minder Server with attacker-controlled REST endpoint CVSS 3.1MEDIUM 5.3
Sources
- CVE-2024-34084 · CVE Program
- CVE-2024-34084 · NVD
- FIRST EPSS
- GHSA-9c5w-9q3f-3hv7 · GitHub Advisory Database · CC BY 4.0
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