CVE-2026-123204
4.3 MEDIUMpublic exploit availablePublished 2026-11-05 · Updated 2026-11-05
AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.
NVD description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weaknesses
CWE-918
Public exploit & PoC references
- https://github.com/goposta/posta/blob/8c3cb6f89c8a992329fac21491c38aed70d05c73/internal/services/webhook/dispatcher.go#L321-L338
- https://github.com/goposta/posta/commit/6bb376b55dcfdcb979040ed42c4bf57b99e4f46a
- https://github.com/goposta/posta/issues/282
- https://github.com/goposta/posta/pull/315
- https://github.com/goposta/posta/releases/tag/v0.18.0
All references
- https://github.com/goposta/posta/blob/8c3cb6f89c8a992329fac21491c38aed70d05c73/internal/services/webhook/dispatcher.go#L321-L338
- https://github.com/goposta/posta/commit/6bb376b55dcfdcb979040ed42c4bf57b99e4f46a
- https://github.com/goposta/posta/issues/282
- https://github.com/goposta/posta/pull/315
- https://github.com/goposta/posta/releases/tag/v0.18.0
- https://www.vulncheck.com/advisories/posta-before-0.18.0-ssrf-via-webhook-url
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.
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