CVE-2023-26117: Angular Remote Code Execution Vulnerability

MODERATE
Advisory Identifier: GHSA-2qqx-w9hr-q5gx
Share
CVSS 5.3
CWE-1333
Published
Advisory Summary

CVE-2023-26117 is a MODERATE (CVSS 5.3) remote code execution vulnerability (CWE-1333: Inefficient Regular Expression Complexity) affecting Angular libraries in the npm ecosystem. The issue involves angular vulnerable to regular expression denial of service via the $resource service. Remediation is available in the latest vendor maintenance releases.

CVE-2023-26117 at a Glance

CVE Identifier CVE-2023-26117
GHSA Identifier GHSA-2qqx-w9hr-q5gx
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-1333: Inefficient Regular Expression Complexity
Affected Product Angular
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2023-26117

To remediate this vulnerability, upgrade all affected Angular dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

angular fixed: Latest secure release 
npm install angular@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls angular

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2023-26117, inspect your project dependencies using npm:

npm ls angular

Analyze the terminal output to locate any version of Angular in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls angular command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1333: Inefficient Regular Expression Complexity, where the product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential. In Angular, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

All versions of the package angular are vulnerable to Regular Expression Denial of Service (ReDoS) via the $resource service 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.

CVE-2023-26117 Affected Angular Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
angular
npm/angular
npm
≤ 1.8.3

References

NVD — CVE-2023-26117 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-26117
Angular Source Repository REPOSITORY
https://github.com/angular/angular.js
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2025/07/msg00005.html
Angular Security Information SECURITY
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-5406323
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OQWJLE5WE33WNMA54XSJIDXBRK2KL3XJ
lists.fedoraproject.org/archives/list/packa... WEB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UDKFLKJ6VZKL52AFVW2OVZRMJWHMW55K
Angular Security Information SECURITY
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBANGULAR-5406325
Angular Security Information SECURITY
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-5406324
Angular Security Information SECURITY
https://security.snyk.io/vuln/SNYK-JS-ANGULAR-3373045
stackblitz.com/edit/angularjs-vuln... WEB
https://stackblitz.com/edit/angularjs-vulnerability-resource-trailing-slashes-redos

Frequently Asked Questions

What is CVE-2023-26117?
CVE-2023-26117 is a security vulnerability in Angular involving angular vulnerable to regular expression denial of service via the $resource service under CWE-1333: Inefficient Regular Expression Complexity.
Which Angular versions are affected?
Affected versions include releases prior to current release patches across affected packages: angular.
What version fixes CVE-2023-26117?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is angular affected?
Yes, angular is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2023-26117?
CVE-2023-26117 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2023-26117?
CVE-2023-26117 is classified under CWE-1333: Inefficient Regular Expression Complexity (The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.).
How can I check npm dependencies for CVE-2023-26117?
Run the dependency tree command: 'npm ls angular'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2qqx-w9hr-q5gx",
  "modified" : "2025-11-03T22:30:32Z",
  "published" : "2023-03-30T06:30:26Z",
  "aliases" : [ "CVE-2023-26117" ],
  "summary" : "angular vulnerable to regular expression denial of service via the $resource service",
  "details" : "All versions of the package angular are vulnerable to Regular Expression Denial of Service (ReDoS) via the $resource service 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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "angular"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.8.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-26117"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/angular/angular.js"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2025/07/msg00005.html"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OQWJLE5WE33WNMA54XSJIDXBRK2KL3XJ"
  }, {
    "type" : "WEB",
    "url" : "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UDKFLKJ6VZKL52AFVW2OVZRMJWHMW55K"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-5406323"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBANGULAR-5406325"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-5406324"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-JS-ANGULAR-3373045"
  }, {
    "type" : "WEB",
    "url" : "https://stackblitz.com/edit/angularjs-vulnerability-resource-trailing-slashes-redos"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1333" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-04-03T13:07:46Z",
    "nvd_published_at" : "2023-03-30T05:15:00Z"
  }
}