CVE-2026-54264 [High] | Information Disclosure in Angularjs

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.1, 21.2.17, and 20.3.25, an information disclosure vulnerability exists in the @angular/service-worker package of the Angular framework. When the Service Worker fetches assets, it preserves metadata (such as headers) from the original request. However, on cross-origin redirects, the Service Worker fails to strip sensitive headers, violating the Fetch redirect algorithm. This allows a remote attacker to obtain sensitive credentials (e.g., Authorization tokens, Proxy-Authorization credentials, or session cookies) by triggering a cross-origin redirect to an untrusted external origin. This vulnerability is fixed in 22.0.1, 21.2.17, and 20.3.25.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-23	0.20%	0.40%	+0.20%
2	2026-06-13	—	0.20%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-23

0.20%

0.40%

+0.20%

2026-06-13

—

0.20%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.3	4.0	HIGH	`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/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` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network. Attack complexity (AC:L) Exploitation conditions are straightforward and stable. Attack requirements (AT:N) No additional preconditions are required beyond normal reachability. Privileges required (PR:N) No privileges are required. User interaction (UI:P) A user has to participate (for example click/open/approve). Vulnerable system confidentiality impact (VC:H) High confidentiality impact on the vulnerable system. Vulnerable system integrity impact (VI:N) No integrity impact on the vulnerable system. Vulnerable system availability impact (VA:N) No availability impact on the vulnerable system. Subsequent system confidentiality impact (SC:H) High confidentiality impact on subsequent systems. Subsequent system integrity impact (SI:N) No integrity impact on subsequent systems. Subsequent system availability impact (SA:N) No availability impact on subsequent systems. Exploit maturity (threat) (E:X) Not defined: no reliable threat intelligence; scoring assumes the worst case (equivalent to Attacked). Confidentiality requirement (CR:X) Not defined: insufficient information; scoring treats this like High (worst case). Integrity requirement (IR:X) Not defined: insufficient information; scoring treats this like High (worst case). Availability requirement (AR:X) Not defined: insufficient information; scoring treats this like High (worst case). Modified attack vector (MAV:X) Not defined: scoring uses the Base Attack Vector (AV). Modified attack complexity (MAC:X) Not defined: scoring uses the Base Attack Complexity (AC). Modified attack requirements (MAT:X) Not defined: scoring uses the Base Attack Requirements (AT). Modified privileges required (MPR:X) Not defined: scoring uses the Base Privileges Required (PR). Modified user interaction (MUI:X) Not defined: scoring uses the Base User Interaction (UI). Modified vulnerable system confidentiality impact (MVC:X) Not defined: scoring uses the Base VC metric. Modified vulnerable system integrity impact (MVI:X) Not defined: scoring uses the Base VI metric. Modified vulnerable system availability impact (MVA:X) Not defined: scoring uses the Base VA metric. Modified subsequent system confidentiality impact (MSC:X) Not defined: scoring uses the Base SC metric. Modified subsequent system integrity impact (MSI:X) Not defined: scoring uses the Base SI metric. Modified subsequent system availability impact (MSA:X) Not defined: scoring uses the Base SA metric. Safety (supplemental) (S:X) Not evaluated. Automatable (supplemental) (AU:X) Not evaluated. Recovery (supplemental) (R:X) Not evaluated. Value density (supplemental) (V:X) Not evaluated. Vulnerability response effort (supplemental) (RE:X) Not evaluated. Provider urgency (supplemental) (U:X) Not evaluated.	—	—	[email protected]
6.1	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:L) Some sensitive info could get out, but not a total data dump. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	2.8	2.7	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.3

4.0

HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:H/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

Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L): Exploitation conditions are straightforward and stable.
Attack requirements (AT:N): No additional preconditions are required beyond normal reachability.
Privileges required (PR:N): No privileges are required.
User interaction (UI:P): A user has to participate (for example click/open/approve).
Vulnerable system confidentiality impact (VC:H): High confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:N): No integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:N): No availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:H): High confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N): No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N): No availability impact on subsequent systems.
Exploit maturity (threat) (E:X): Not defined: no reliable threat intelligence; scoring assumes the worst case (equivalent to Attacked).
Confidentiality requirement (CR:X): Not defined: insufficient information; scoring treats this like High (worst case).
Integrity requirement (IR:X): Not defined: insufficient information; scoring treats this like High (worst case).
Availability requirement (AR:X): Not defined: insufficient information; scoring treats this like High (worst case).
Modified attack vector (MAV:X): Not defined: scoring uses the Base Attack Vector (AV).
Modified attack complexity (MAC:X): Not defined: scoring uses the Base Attack Complexity (AC).
Modified attack requirements (MAT:X): Not defined: scoring uses the Base Attack Requirements (AT).
Modified privileges required (MPR:X): Not defined: scoring uses the Base Privileges Required (PR).
Modified user interaction (MUI:X): Not defined: scoring uses the Base User Interaction (UI).
Modified vulnerable system confidentiality impact (MVC:X): Not defined: scoring uses the Base VC metric.
Modified vulnerable system integrity impact (MVI:X): Not defined: scoring uses the Base VI metric.
Modified vulnerable system availability impact (MVA:X): Not defined: scoring uses the Base VA metric.
Modified subsequent system confidentiality impact (MSC:X): Not defined: scoring uses the Base SC metric.
Modified subsequent system integrity impact (MSI:X): Not defined: scoring uses the Base SI metric.
Modified subsequent system availability impact (MSA:X): Not defined: scoring uses the Base SA metric.
Safety (supplemental) (S:X): Not evaluated.
Automatable (supplemental) (AU:X): Not evaluated.
Recovery (supplemental) (R:X): Not evaluated.
Value density (supplemental) (V:X): Not evaluated.
Vulnerability response effort (supplemental) (RE:X): Not evaluated.
Provider urgency (supplemental) (U:X): Not evaluated.

—

[email protected]

6.1

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

2.8

2.7

[email protected]

OS Trackers for CVE-2026-54264

vendor	priority	summary	link
`debian`	not yet assigned	CVE-2026-54264 not yet assigned priority: Debian including 1 source packages (angular.js), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): undetermined 5.	https://security-tracker.debian.org/tracker/CVE-2026-54264
`ubuntu`	medium	CVE-2026-54264 medium priority: Ubuntu including 1 source packages (angular.js), 8 status rows across 8 suites (bionic, focal, jammy, noble, questing, resolute, upstream, xenial): needs-triage 8.	https://ubuntu.com/security/CVE-2026-54264

Affected software / configurations for CVE-2026-54264

Vendor	Product	Version	Raw CPE
angularjs	angularjs	<= 19.2.25	cpe:2.3:a:angularjs:angularjs::::::::
angularjs	angularjs	>= 20.0.0, < 20.3.25	cpe:2.3:a:angularjs:angularjs::::::::
angularjs	angularjs	>= 21.0.0, < 21.2.17	cpe:2.3:a:angularjs:angularjs::::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:next0::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:next1::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:next10::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:next11::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:next12::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:next2::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:next3::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:next4::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:next5::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:next6::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:next7::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:next8::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:next9::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:rc0::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:rc1::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:rc2::::::
angularjs	angularjs	22.0.0	cpe:2.3:a:angularjs:angularjs:22.0.0:rc3::::::

References for CVE-2026-54264

URL	Tags
https://github.com/angular/angular/commit/47d68dcb26266316647133ab6385e77fc3e5ae08	Patch
https://github.com/angular/angular/pull/69029	Issue Tracking Patch
https://github.com/angular/angular/security/advisories/GHSA-qxh6-94w6-9r5p	Third Party Advisory

URL

CVE-2026-54264 | Angular: Sensitive Header Leakage on Cross-Origin Redirects in Angular Service Worker

Exploit prediction scoring system (EPSS) score for CVE-2026-54264

Common vulnerability scoring system (CVSS) metrics for CVE-2026-54264

Weakness enumeration for CVE-2026-54264

GitHub Security Advisory for CVE-2026-54264

OS Trackers for CVE-2026-54264

Affected software / configurations for CVE-2026-54264

References for CVE-2026-54264