CVE-2026-85267 Cross-Site WebSocket Hijacking in Google Cloud Shell
High 8.7
Published
Updated
Check this codebase for CVE-2026-85267 and fix it if it is affected.
What it is: CVE-2026-85267 is a high-severity vulnerability in Google Cloud Cloud Shell, published on 20 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-85267 in the wild and no public exploit code.
Affected product: Google Cloud Cloud Shell. 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-2026-85267/ (Markdown: https://insights.sbomify.com/CVE-2026-85267/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-85267?
CVE-2026-85267 is a high-severity vulnerability in Google Cloud Cloud Shell, published on 20 Oct 2026.
Official description
A Cross-Site WebSocket Hijacking vulnerability in Cloud Shell prior to 2026-07-22 on Google Cloud Platform allows an unauthenticated attacker to hijack an active Cloud Shell session and exfiltrate the user's OAuth access token using a cross-origin WebSocket request.
This vulnerability was patched on 22 July 2026, and no customer action is needed.
Weakness: CWE-1385
Which versions are affected by CVE-2026-85267?
How do I fix CVE-2026-85267?
No fix has been published for CVE-2026-85267 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-85267 being exploited?
There is no known exploitation of CVE-2026-85267 in the wild and no public exploit code.
Sources
Also known as GHSA-342c-3cqc-4gph.