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Fencer Vulns
medium 4.0

CVE-2026-88059 json

Angular: Information Leak via `HttpTransferCache` Bypass When Using `withRequestsMadeViaParent`

published 2026-09-10 59 d ago modified 2026-09-29 40 d ago also EUVD-2026-75702 , GHSA-p297-fm68-3q8c

cvss
4.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 27%
public exploits
0
none known

Summary

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.28, 21.2.20, and 22.1.1, Angular's @angular/common HttpTransferCache can cache an authenticated response when Server-Side Rendering (SSR) and hydration use a hierarchical HttpClient configured with withRequestsMadeViaParent. The child TransferCache evaluates an initially anonymous request before delegation, then a parent withInterceptors chain adds an Authorization header, cookie, or API token; although the parent cache skips the authenticated request, the child still stores the private response in TransferState serialized as JSON in the ng-state script. Exploitation requires provideClientHydration, child provideHttpClient delegation through withRequestsMadeViaParent, parent-level credential injection, and an SSR HTML response shared across users by a CDN, reverse proxy, or application cache. A later unauthenticated or unauthorized visitor can receive the cached HTML containing the earlier authenticated user's sensitive response data. Applications can mitigate by attaching credentials at the child, filtering sensitive endpoints with withHttpTransferCacheOptions, disabling transfer caching for sensitive routes, or marking personalized HTML private or no-store. This issue is fixed in versions 20.3.28, 21.2.20, and 22.1.1.

Patch / fix

  • npm @angular/common 20.3.28, 21.2.20, 22.1.1
  • angular angular 20.3.28, 21.2.20, 22.1.1
  • angular angular/common 20.3.28, 21.2.20, 22.1.1

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-2026-88059 updated cvss 4.0

Angular: Angular: Information Leak via HttpTransferCache Bypass

  • Red Hat A-MQ Interconnect 1 qpid-dispatch 1.8.0-2.el8 Red Hat Ceph Storage 4 rhceph/rhceph-4-dashboard-rhel8
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 firefox, firefox 140.14.0-1.el10_2 Red Hat Enterprise Linux 8 grafana, mozjs60, grafana-loki, grafana-mssql, grafana-mysql, grafana-selinux, +10 more Red Hat Enterprise Linux 9 grafana, grafana-selinux, grafana 10.2.6-28.el10_2.5 Red Hat Enterprise Linux 10 gjs 1.80.2-11.el10, firefox 140.14.0-1.el10_2, grafana 10.2.6-28.el10_2.5, thunderbird 140.14.0-1.el10_2
    affected: no fix available “Fix deferred”
  • Red Hat Fuse 7 angular Red Hat OpenStack Platform 16.2 qpid-dispatch-tools, qpid-dispatch-router
    affected: no fix planned “Out of support scope”
  • Red Hat Quay 3 quay/quay-rhel8, quay/quay-rhel9
    affected: no fix available, no fix planned “Out of support scope”
  • Red Hat Single Sign-On 7 rh-sso-server-dist.zip 7.6.12
    affected: no fix planned “Out of support scope”

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
no
Technical impact
partial
Assessed
58 d ago

Exploit prediction

0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/angular/angular/security/advisories/GHSA-p297-fm68-3q8c referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 4.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
GitHub 3.1 4.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
NVD 3.1 5.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
npm @angular/common
>=22.0.0, <22.1.1
>=21.0.0, <21.2.20
>=20.0.0, <20.3.28
<=19.2.25
22.1.1
21.2.20
20.3.28

Affected products

  • angular angular

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-524 Use of Cache Containing Sensitive Information

References

Sources

Fencer Vulns 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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.