CVE-2023-26117Public exploitNetwork attack vector

Client-side hang via trailing-slash URL processing

Published Mar 30, 2023 · Updated Nov 3, 2025

Regular expression denial of service in Google AngularJS 1.0.0 through 1.8.3 allows attackers to hang a browser via a crafted URL. Route.setUrlParams applies an anchored trailing-slash regular expression to the computed URL, causing excessive backtracking on long slash runs followed by a non-slash. Execution requires an application to use ngResource with attacker-influenced URL data; the originating Snyk advisory now disputes the issue and calls it not a vulnerability.

CVSS severity5.3
Medium
EPSS probability1.70%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Regular expression denial of service in Google AngularJS 1.0.0 through 1.8.3 allows attackers to hang a browser via a crafted URL. Route.setUrlParams applies an anchored trailing-slash regular expression to the computed URL, causing excessive backtracking on long slash runs followed by a non-slash. Execution requires an application to use ngResource with attacker-influenced URL data; the originating Snyk advisory now disputes the issue and calls it not a vulnerability.

The record

CVE
CVE-2023-26117
Published
Mar 30, 2023
Updated
Nov 3, 2025
Vendor
Google
Product
AngularJS
Classifications
CWE-1333, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 30, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <*
  2. Affected versionversion=1.0.0 <*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google · AngularJSversion=0 <*; version=1.0.0 <*

Published CVSS scores

5.3GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1333Inefficient Regular Expression Complexity
T1499.003Application Exhaustion Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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