# CVE-2026-50639: Metrics::Any::Adapter::SignalFx versions before 0.04 for Perl does not protect against metric injections

> Attackers can inject arbitrary metrics or tags into SignalFx monitoring data via newline characters in Perl applications using this library.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/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 Jun 2026
- **Updated:** 19 Jun 2026
- **Also known as:** GHSA-xr5m-f4c4-pqjm

## What is CVE-2026-50639?

CVE-2026-50639 is a medium-severity vulnerability in PEVANS Metrics::Any::Adapter::SignalFx, published on 10 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Metrics::Any::Adapter::SignalFx versions before 0.04 for Perl does not protect against metric injections.

The statsd protocol (and extensions such as dogstatsd) allow mutiple metrics, separated by newlines, to be sent per packet.

Metrics::Any::Adapter::SignalFx which extends Metrics::Any::Adapter::Statsd, which has a similar vulnerability.

In addition, the _labels function does not check tags labels newlines or statsd control characters. The labels can be used for metric injections.

Weakness: CWE-93 (Improper Neutralization of CRLF Sequences), CWE-150 (Improper Neutralization of Escape, Meta, or Control Sequences)

## Which versions are affected by CVE-2026-50639?

It affects 1 product.


Products: Pevans Metrics\.

## How do I fix CVE-2026-50639?

No fix has been published for CVE-2026-50639 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-50639 being exploited?

There is no known exploitation of CVE-2026-50639 in the wild and no public exploit code.

## Other vulnerabilities in PEVANS Metrics::Any::Adapter::SignalFx

- [CVE-2026-50638](https://insights.sbomify.com/CVE-2026-50638/): Metrics::Any::Adapter::DogStatsd versions before 0.04 for Perl does not protect against metric injections (critical 9.1)
- [CVE-2026-50637](https://insights.sbomify.com/CVE-2026-50637/): Metrics::Any::Adapter::Statsd versions before 0.04 for Perl does not protect against metric injections (high 8.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-50639 and fix it if it is affected.

What it is: CVE-2026-50639 is a medium-severity vulnerability in PEVANS Metrics::Any::Adapter::SignalFx, published on 10 Jun 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-2026-50639 in the wild and no public exploit code.

Affected product: PEVANS Metrics::Any::Adapter::SignalFx. 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-2026-50639/ (Markdown: https://insights.sbomify.com/CVE-2026-50639/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-50639
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-50639
- OSV: https://osv.dev/vulnerability/CVE-2026-50639

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-50639/
Summaries are generated and may contain mistakes; the official description above is the record.