# CVE-2026-124992: nushell Data Conversion ser.rs escape_bytes control sequence

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulDB) — https://github.com/nushell/nushell/pull/19443

## Affected products and versions

- n/a / nushell: 0.116.0 (affected); 0.116.1 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 4.8 (medium); CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 3.3 (low); 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; source: CNA: VulDB

- CVSS 3.0: 3.3 (low); CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 2.0: 1.7 (low); AV:L/AC:L/Au:S/C:N/I:P/A:N/E:POC/RL:ND/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-150, CWE-20

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://vuldb.com/vuln/433164 (CNA: VulDB; vdb-entry, technical-description)

- https://vuldb.com/vuln/433164/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-124992 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1040563 (CNA: VulDB; third-party-advisory)

- https://github.com/nushell/nushell/issues/19197 (CNA: VulDB; issue-tracking)

- https://github.com/nushell/nushell/pull/19443 (CNA: VulDB; issue-tracking, patch)

- https://github.com/nushell/nushell/ (CNA: VulDB; product)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-124992; retrieved 2026-11-09; source updated 2026-11-09

Revision: 902b9842ccb0ce2138e2c2734e13cd0694c0d6c801bc62f79fb424c679a09885

Canonical: https://y2.dev/cve/CVE-2026-124992

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