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Fencer Intel
high 8.2

CVE-2026-111751 json

Angular: Denial of Service via RouterLink Query Parameter Retention in Server-Side Rendering (SSR)

published 20d ago modified 2d ago also GHSA-57xq-rjx2-v5xh , EUVD-2026-116379

cvss
8.2
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. From 21.2.0 until 21.2.25 and 22.2.1, RouterLink directives rendered during Node.js server-side rendering retain computed UrlTree instances for the lifetime of each request. When queryParamsHandling is set to merge or preserve, either per link or through defaultQueryParamsHandling, every rendered link can retain a copy of attacker-controlled query parameters in its UrlTree. When upstream proxies or load balancers forward oversized query strings without rejecting them at the edge, multiple affected links and overlapping renders can amplify heap use until the Node.js old-space heap is exhausted and the SSR worker terminates. Numeric query-parameter names increase allocation pressure but are not required, memory is released after rendering completes, and pure client-side SPAs are not affected. This issue is fixed in versions 21.2.25 and 22.2.1.

Patch / fix

  • npm @angular/router 21.2.25, 22.2.1

Is CVE-2026-111751 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-111751 updated cvss 7.5

@angular/router: @angular/router: Denial of Service via query parameter memory retention during server-side rendering

  • Red Hat Advanced Cluster Management for Kubernetes 2 rhacm2/volsync-rhel9, rhacm2/volsync-operator-bundle Red Hat Enterprise Linux 7 firefox, firefox 140.17.0-1.el10_0 Red Hat Enterprise Linux 8 firefox, mozjs60, thunderbird, firefox 140.17.0-1.el10_0, thunderbird 153.5.0-1.el10_2, dotnet5.0-build-reference-packages 0-12.20211117git6ce5818.el8_5 Red Hat Enterprise Linux 9 firefox, librbd1, librados2, firefox-x11, thunderbird, gjs 1.80.2-11.el10, +2 more Red Hat Enterprise Linux 10 ceph 18.2.1-4.el10, gjs 1.80.2-11.el10, firefox 140.17.0-1.el10_0, thunderbird 153.5.0-1.el10_2 Red Hat Fuse 7 redhat-fuse-sources.zip 7.13.0, redhat-fuse-maven-repository.zip 7.13.0
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2d ago

Exploit prediction

0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 4.0 8.2 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA 4.0 8.2 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
npm @angular/router
>=22.0.0, <22.2.1
>=21.2.0, <21.2.25
22.2.1
21.2.25

Affected products

  • angular angular

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.