CVE-2026-48294

CVE-2026-48294 (CVSS 7.4 HIGH) is a UXSS-class cross-origin data disclosure vulnerability in the Adobe Acrobat PDF Extension for Chrome (ID: efaidnbmnnnibpcajpcglclefindmkaj), affecting versions 26.5.2.2 and earlier (~314 million users). Codenamed HermeticReader by Guardio Labs, the flaw exploits...

CVE-2026-53840

OpenClaw before 2026.5.12 contains an information disclosure vulnerability in streamable-http MCP servers that forwards operator-configured custom headers during cross-origin redirects. Attackers controlling or compromising an MCP endpoint can redirect requests to exfiltrate sensitive headers lik...

CVE-2026-53840 OpenClaw < 2026.5.12 - Custom Header Leakage via MCP Streamable HTTP Cross-Origin Redirects

OpenClaw before 2026.5.12 contains an information disclosure vulnerability in streamable-http MCP servers that forwards operator-configured custom headers during cross-origin redirects. Attackers controlling or compromising an MCP endpoint can redirect requests to exfiltrate sensitive headers lik...

CVE-2026-53840 OpenClaw < 2026.5.12 - Custom Header Leakage via MCP Streamable HTTP Cross-Origin Redirects

OpenClaw before 2026.5.12 contains an information disclosure vulnerability in streamable-http MCP servers that forwards operator-configured custom headers during cross-origin redirects. Attackers controlling or compromising an MCP endpoint can redirect requests to exfiltrate sensitive headers lik...

CVE-2026-53840 OpenClaw < 2026.5.12 - Custom Header Leakage via MCP Streamable HTTP Cross-Origin Redirects

OpenClaw before 2026.5.12 contains an information disclosure vulnerability in streamable-http MCP servers that forwards operator-configured custom headers during cross-origin redirects. Attackers controlling or compromising an MCP endpoint can redirect requests to exfiltrate sensitive headers lik...

CVE-2026-53840

OpenClaw CVE-2026-53840 affects the OpenClaw MCP stack before version 2026.5.12. The issue is an information-disclosure vulnerability in streamable-http MCP servers that forwards operator-configured custom headers during cross-origin redirects. If an attacker controls or can compromise an MCP end...

Permissive Cross-domain Policy with Untrusted Domains

Overview hono is an Ultrafast web framework for the Edges Affected versions of this package are vulnerable to Permissive Cross-domain Policy with Untrusted Domains in the CORS middleware. An attacker can access sensitive information and perform unauthorized actions by sending cross-origin request...

GHSA-88FW-HQM2-52QC hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard

Summary With credentials: true and no explicit origin the default wildcard, the CORS Middleware reflects the request's Origin and sends Access-Control-Allow-Credentials: true. Any site can then make credentialed cross-origin requests and read the responses, exposing cookie-authenticated endpoints...

hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard

Summary With credentials: true and no explicit origin the default wildcard, the CORS Middleware reflects the request's Origin and sends Access-Control-Allow-Credentials: true. Any site can then make credentialed cross-origin requests and read the responses, exposing cookie-authenticated endpoints...

NPM: hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard

NPM: hono: CORS Middleware reflects any Origin with credentials when origin defaults to the wildcard vulnerability discovered by ? in WordPress Npm hono versions 4.12.25...

CVE-2026-53900 Cookie injection was possible when opening a PDF link

Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in TemporaryDocument, allowing a malicious site to inject arbitrary cookies into requests to an unrelated target domain. This vulnerability was fixed in Firefox for iOS 152.0...

CVE-2026-53900

Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in TemporaryDocument, allowing a malicious site to inject arbitrary cookies into requests to an unrelated target domain. This vulnerability was fixed in Firefox for iOS 152.0...

CVE-2026-53900

CVE-2026-53900 concerns Firefox for iOS. The issue: cookies set on the initial PDF request were preserved across cross-origin HTTP redirects in TemporaryDocument, enabling a malicious site to inject cookies into requests to an unrelated target domain. The CVE has a base score of 4.3 (Medium) per ...

EUVD-2026-37078

Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in TemporaryDocument, allowing a malicious site to inject arbitrary cookies into requests to an unrelated target domain. This vulnerability was fixed in Firefox for iOS 152.0...

CVE-2026-53899

CVE-2026-53899 affects Firefox for iOS. The issue arises from partial domain matching when attaching cookies to PDF requests, enabling a malicious site on a suffix domain to receive cookies belonging to the target site. The root cause is tied to how cookies were matched during PDF handling, leadi...

CVE-2026-53899 Cross-origin cookies could be leaked when opening a PDF link

Firefox for iOS used partial domain matching when attaching cookies to PDF requests, allowing a malicious site on a suffix domain to receive cookies belonging to the target site. This vulnerability was fixed in Firefox for iOS 152.0...

PT-2026-50077

Name of the Vulnerable Software and Affected Versions Adobe Acrobat PDF Extension Chrome versions prior to 26.5.2.3 Description A UXSS-class cross-origin data disclosure issue exists where an attacker can gain access to the victim's session data. UXSS Universal Cross-Site Scripting is a type of...

PT-2026-49701

Name of the Vulnerable Software and Affected Versions Firefox for iOS versions prior to 152.0 Description Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in TemporaryDocument. This behavior allows a malicious site to inject arbitrary cookies int...

PT-2026-49757

Name of the Vulnerable Software and Affected Versions OpenClaw versions prior to 2026.5.12 Description An information disclosure issue exists in streamable-http MCP servers that forwards operator-configured custom headers during cross-origin redirects. Attackers controlling or compromising an MCP...

PT-2026-49737

Name of the Vulnerable Software and Affected Versions Hono versions prior to 4.12.25 Description The CORS Middleware reflects the request Origin and sends Access-Control-Allow-Credentials: true when credentials: true is enabled and no explicit origin is defined defaulting to the wildcard. This...