CVE-2026-88059Network attack vector

Private response disclosure via premature cache eligibility

Published Sep 10, 2026 · Updated Sep 10, 2026

Information disclosure in Angular's @angular/common allows remote attackers to read cached authenticated responses from shared SSR HTML. The child HttpTransferCache judges an initially anonymous request cacheable before a parent interceptor adds credentials, then stores the private response in TransferState. Exposure requires SSR hydration, withRequestsMadeViaParent delegation, parent-level credential injection, and HTML reuse across users by a shared cache.

CVSS severity4.0
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Angular's @angular/common allows remote attackers to read cached authenticated responses from shared SSR HTML. The child HttpTransferCache judges an initially anonymous request cacheable before a parent interceptor adds credentials, then stores the private response in TransferState. Exposure requires SSR hydration, withRequestsMadeViaParent delegation, parent-level credential injection, and HTML reuse across users by a shared cache.

The record

CVE
CVE-2026-88059
Published
Sep 10, 2026
Updated
Sep 10, 2026
Vendor
Angular
Product
Angular
Classifications
CWE-524, CWE-200, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 10, 2026Record 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=<= 19.2.25
  2. Affected versionversion=>= 20.0.0, < 20.3.28
  3. Affected versionversion=>= 21.0.0, < 21.2.20
  4. Affected versionversion=>= 22.0.0, < 22.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Angular · Angularversion=<= 19.2.25; version=>= 20.0.0, < 20.3.28; version=>= 21.0.0, < 21.2.20; version=>= 22.0.0, < 22.1.1

Published CVSS scores

4.0GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-524Use of Cache Containing Sensitive Information
CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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