Bug 2567435 (CVE-2026-123204) - CVE-2026-123204 github.com/goposta/posta: Posta: Server-side request forgery via arbitrary webhook URLs
Summary: CVE-2026-123204 github.com/goposta/posta: Posta: Server-side request forgery ...
Keywords:
Status: NEW
Alias: CVE-2026-123204
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-05 21:57 UTC by OSIDB Bzimport
Modified: 2026-11-05 22:02 UTC (History)
0 users

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Description OSIDB Bzimport 2026-11-05 21:57:32 UTC 
Posta before v0.18.0 contains a server-side request forgery vulnerability that allows authenticated users with edit rights to make the backend send POST requests to internal destinations by creating webhooks with arbitrary URLs. Attackers can target loopback, private-network or cloud metadata addresses and read delivery status codes and error strings to probe internal hosts and ports.
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