CVE-2026-75757 AshAdmin cookie reader matches names by substring, enabling actor/session shadowing from a sibling subdomain

Reliance on Cookies without Validation and Integrity Checking vulnerability in ash-project ashadmin lets an attacker who controls a sibling subdomain rebind an admin's session to a different actor, tenant, or authorization mode. AshAdmin's client JavaScript read its state cookies tenant,...

CVE-2026-75757

ash_admin (ash-project) is vulnerable to session/actor shadowing via a flawed client-side cookie reader. The JavaScript reads state cookies (e.g., actor_authorizing, actor_domain) using an unanchored regex (new RegExp(name + "=([^;]+)")) against document.cookie, so any cookie whose name merely en...

GHSA-R5RP-J6WH-RVV4 Hono: Non-breaking space prefix bypass in cookie name handling in getCookie()

Summary A discrepancy between browser cookie parsing and parse handling allows cookie prefix protections to be bypassed. Cookie names that are treated as distinct by the browser may be normalized to the same key by parse, allowing attacker-controlled cookies to override legitimate ones. Details...

Astra Linux – Vulnerability in Firefox

Setting a nameless cookie with an equals sign in its value can shadow other cookies. This occurs even if the nameless cookie is set via HTTP, and if the shadowed cookie includes the Secure attribute. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird...

Linux Distros Unpatched Vulnerability : CVE-2025-8037

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was set over HTTP and the shadowed cookie include...

FreeBSD : Mozilla -- cookie shadowing (5abc2187-685e-11f0-a12d-b42e991fc52e)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 5abc2187-685e-11f0-a12d-b42e991fc52e advisory. [email protected] reports: Setting a nameless cookie with an equals sign in the value shadowed other...

SUSE CVE-2025-8037

Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was set over HTTP and the shadowed cookie included the Secure attribute. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1...

CVE-2025-8037

Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was set over HTTP and the shadowed cookie included the Secure attribute. This vulnerability affects Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1...

CVE-2025-8037

Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was set over HTTP and the shadowed cookie included the Secure attribute. This vulnerability affects Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1...

CVE-2025-8037 Nameless cookies shadow secure cookies

Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was set over HTTP and the shadowed cookie included the Secure attribute. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1...

CVE-2025-8037

Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was set over HTTP and the shadowed cookie included the Secure attribute. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1...

CVE-2025-8037

Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was set over HTTP and the shadowed cookie included the Secure attribute. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1...

CVE-2025-8037: Sensitive Cookie in HTTPS Session Without 'Secure' Attribute

Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was set over HTTP and the shadowed cookie included the Secure attribute. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1...

Mozilla -- cookie shadowing

[email protected] reports: Setting a nameless cookie with an equals sign in the value shadowed other cookies. Even if the nameless cookie was set over HTTP and the shadowed cookie included the Secure attribute...

Security Vulnerabilities fixed in Thunderbird 140.1 — Mozilla

On 64-bit platforms IonMonkey-JIT only wrote 32 bits of the 64-bit return value space on the stack. Baseline-JIT, however, read the entire 64 bits. On arm64, a WASM brtable instruction with a lot of entries could lead to the label being too far from the instruction causing truncation and incorrec...

PT-2025-30486

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 141 Firefox ESR versions prior to 140.1 Thunderbird versions prior to 141 Thunderbird versions prior to 140.1 Description Setting a nameless cookie with an equals sign in the value shadowed other cookies. This occurre...

python-werkzeug: cookie prefixed with = can shadow unprefixed cookie

A flaw was found in python-werkzeug. Browsers may allow "nameless" cookies like =value instead of key=value. A vulnerable browser may allow a compromised application on an adjacent subdomain to exploit this to set a cookie for another subdomain. If a Werkzeug application is running next to a...

USN-5948-1 python-werkzeug vulnerabilities

It was discovered that Werkzeug did not properly handle the parsing of nameless cookies. A remote attacker could possibly use this issue to shadow other cookies. CVE-2023-23934 It was discovered that Werkzeug could be made to process unlimited number of multipart form data parts. A remote attacke...

python-werkzeug: cookie prefixed with = can shadow unprefixed cookie

A flaw was found in python-werkzeug. Browsers may allow "nameless" cookies like =value instead of key=value. A vulnerable browser may allow a compromised application on an adjacent subdomain to exploit this to set a cookie for another subdomain. If a Werkzeug application is running next to a...