Vulnerability · Published Aug 20, 2026 · Assigned by VulnCheck

CVE-2026-77067Omnivore Stored Server-Side Request Forgery via the setWebhook Mutation

Medium 5.0

In plain English

A medium-severity server-side request forgery in omnivore from omnivore-app. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 3.1)5.0Medium

Exploit odds (30 days)0.3%top 80.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

The setWebhookResolver in packages/api/src/resolvers/webhooks/index.ts stores the caller-supplied url without any address validation, and the file imports no validation helper. When a subscribed event fires, callWebhook in packages/api/src/jobs/call_webhook.ts issues axios.request with that url, the method and Content-Type recorded on the webhook, and a JSON body carrying the event data, so an authenticated user can make the server send repeated attacker-shaped requests to internal endpoints, including link-local metadata addresses. The request is blind: callWebhook discards the result and writes only a success line or the axios error to the server log, so the response is not returned through the API.

Affected products (as reported)

Vendor	Product	Versions
omnivore-app	omnivore	0 – before c4d7d8562e6b9aabb1d8e4dabca268e314baa43a

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N

References

GitHub Issue #4647 issue-tracking
fix(): fix ssrf via scan feeds and webhooks (#4656) patch
setWebhookResolver storing the URL unvalidated before the fix technical-description
callWebhook dispatching axios.request to the stored URL technical-description
https://github.com/omnivore-app/omnivore product
VulnCheck Advisory: Omnivore Stored Server-Side Request Forgery via the setWebhook Mutation third-party-advisory