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

> Attackers can intercept unsecured UDP traffic to leak user IP addresses from Plack::Middleware::Statsd unless the channel is secured or updated.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 May 2026
- **Updated:** 12 May 2026
- **Also known as:** GHSA-9gwm-665p-w2xx

## What is CVE-2026-45179?

CVE-2026-45179 is a medium-severity vulnerability in RRWO Plack::Middleware::Statsd, published on 10 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-319 (Cleartext Transmission of Sensitive Information)

## Which versions are affected by CVE-2026-45179?


## How do I fix CVE-2026-45179?

No fix has been published for CVE-2026-45179 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-45179 being exploited?

There is no known exploitation of CVE-2026-45179 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-45179 and fix it if it is affected.

What it is: CVE-2026-45179 is a medium-severity vulnerability in RRWO Plack::Middleware::Statsd, published on 10 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-45179 in the wild and no public exploit code.

Affected product: RRWO Plack::Middleware::Statsd. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-45179/ (Markdown: https://insights.sbomify.com/CVE-2026-45179/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-45179
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-45179
- OSV: https://osv.dev/vulnerability/CVE-2026-45179

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-45179/
Summaries are generated and may contain mistakes; the official description above is the record.