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Firebase JavaScript SDK utilizes a "FIREBASE_DEFAULTS" cookie to store configuration data, including an "_authTokenSyncURL" field used for session synchronization. If this cookie field is preset via an attacker by any other method, the attacker can manipulate the "_authTokenSyncURL" to point to their own server and it would allow am actor to capture user session data transmitted by the SDK. We recommend upgrading Firebase JS SDK at least to 10.9.0.
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renovateBot
changed the title
fix(deps): Update dependency firebase to v10 [SECURITY]
fix(deps): Update dependency firebase to v10 [SECURITY] - autoclosed
Mar 27, 2026
renovateBot
changed the title
fix(deps): Update dependency firebase to v10 [SECURITY] - autoclosed
fix(deps): Update dependency firebase to v10 [SECURITY]
Mar 30, 2026
renovateBot
changed the title
fix(deps): Update dependency firebase to v10 [SECURITY]
fix(deps): update dependency firebase to v10 [security]
Jun 22, 2026
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This PR contains the following updates:
^7.24.0→^10.0.0Firebase JavaScript SDK allows attackers to manipulate the "_authTokenSyncURL" to point to their own server
CVE-2024-11023 / GHSA-3wf4-68gx-mph8
More information
Details
Firebase JavaScript SDK utilizes a "FIREBASE_DEFAULTS" cookie to store configuration data, including an "_authTokenSyncURL" field used for session synchronization. If this cookie field is preset via an attacker by any other method, the attacker can manipulate the "_authTokenSyncURL" to point to their own server and it would allow am actor to capture user session data transmitted by the SDK. We recommend upgrading Firebase JS SDK at least to 10.9.0.
Severity
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:A/VC:L/VI:L/VA:L/SC:H/SI:H/SA:H/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:XReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Release Notes
firebase/firebase-js-sdk (firebase)
v10.9.0Compare Source
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