CVE-2026-124992 nushell Data Conversion ser.rs escape_bytes control sequence
Medium 4.8
Published
Updated
Check this codebase for CVE-2026-124992 and fix it if it is affected.
What it is: CVE-2026-124992 is a medium-severity vulnerability in nushell, published on 9 Nov 2026.
Exploitation: There is no known exploitation of CVE-2026-124992 in the wild and no public exploit code.
Affected product: nushell. 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-2026-124992/ (Markdown: https://insights.sbomify.com/CVE-2026-124992/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-124992?
CVE-2026-124992 is a medium-severity vulnerability in nushell, published on 9 Nov 2026.
Official description
A vulnerability was identified in nushell up to 0.116.1. Impacted is the function escape_bytes of the file crates/nu-json/src/ser.rs of the component Data Conversion Handler. The manipulation leads to improper neutralization of escape, meta, or control sequences. The attack must be carried out locally. The pull request to fix this issue awaits acceptance.
Which versions are affected by CVE-2026-124992?
How do I fix CVE-2026-124992?
No fix has been published for CVE-2026-124992 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-124992 being exploited?
There is no known exploitation of CVE-2026-124992 in the wild and no public exploit code.
Sources
Also known as GHSA-xwxm-rqhj-8mmw.