CVE-2023-46746: Authenticated PostHog users vulnerable to SSRF

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-12-01 · updated 2026-06-17
Weakness: CWE-918

Description

PostHog provides open-source product analytics, session recording, feature flagging and A/B testing that you can self-host. A server-side request forgery (SSRF), which can only be exploited by authenticated users, was found in Posthog. Posthog did not verify whether a URL was local when enabling webhooks, allowing authenticated users to forge a POST request. This vulnerability has been addressed in `22bd5942` and will be included in subsequent releases. There are no known workarounds for this vulnerability.

Affected products

PostHog: through 1.43.1

References

https://github.com/PostHog/posthog/commit/22bd5942638d5d9bc4bd603a9bfe8f8a95572292
https://github.com/PostHog/posthog/security/advisories/GHSA-wqqw-r8c5-j67c
https://securitylab.github.com/advisories/GHSL-2023-185_posthog_posthog/
https://github.com/PostHog/posthog/commit/22bd5942638d5d9bc4bd603a9bfe8f8a95572292
https://github.com/PostHog/posthog/security/advisories/GHSA-wqqw-r8c5-j67c
https://securitylab.github.com/advisories/GHSL-2023-185_posthog_posthog/

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