Improper input validation in Nushell
CVE-2026-124992
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.
Published .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:C.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Nushell — versions 0.116.0, 0.116.1
Weakness classification (CWE)
References
- VDB-433164 | nushell Data Conversion ser.rs escape_bytes control sequence (vdb-entry, technical-description)
- VDB-433164 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- CVE-2026-124992 | CVE Analysis and Report (third-party-advisory)
- Submit #1040563 | https://github.com/nushell/ nushell 0.114.1 Improper Encoding or Escaping of Output (third-party-advisory)
- github.com/nushell/nushell/issues/19197 (issue-tracking)
- github.com/nushell/nushell/pull/19443 (issue-tracking, patch)
- github.com/nushell/nushell/ (product)
Frequently asked questions
- What is CVE-2026-124992?
- CVE-2026-124992 is a low-severity vulnerability in Nushell, classified under CWE-150. CVSS score: 3.3/10. Published 2026-11-09.
- How severe is CVE-2026-124992?
- Low severity. CVSS v3 base score is 3.3 out of 10.