Traefik: Cross-user response poisoning via proxied CONNECT on Traefik's shared backend keep-alive pool

Summary There is a critical vulnerability in Traefik's default HTTP reverse proxy that leads to unauthenticated cross-user response poisoning. When a client opens an HTTP/2 or HTTP/3 CONNECT request, Traefik forwards it — body included — to an HTTP/1.1 upstream over a shared net/http.Transport. I...

GHSA-3CCP-42PG-HGV6 Traefik: Cross-user response poisoning via proxied CONNECT on Traefik's shared backend keep-alive pool

Summary There is a critical vulnerability in Traefik's default HTTP reverse proxy that leads to unauthenticated cross-user response poisoning. When a client opens an HTTP/2 or HTTP/3 CONNECT request, Traefik forwards it — body included — to an HTTP/1.1 upstream over a shared net/http.Transport. I...

EEF-CVE-2026-68749 Quadratic regex backtracking in the html_sanitize_ex CSS scrubber allows CPU-exhaustion denial of service

Summary Inefficient Regular Expression Complexity vulnerability in the CSS scrubber in rrrene html\sanitize\ex allows an unauthenticated remote attacker to exhaust server CPU via a long CSS declaration in sanitized HTML. The declaration regex in HtmlSanitizeEx.Scrubber.CSS.scrub/1 matches the...

EEF-CVE-2026-68747 CSS sanitizer allowlist bypass in html_sanitize_ex via non-declaration input

Summary Improper Neutralization of Special Elements in Output Used by a Downstream Component 'Injection' vulnerability in the CSS scrubber in rrrene html\sanitize\ex allows an unauthenticated remote attacker to inject CSS at-rules, including an import of a remote stylesheet, into a page served to...

CVE-2026-66829

URL Redirection to Untrusted Site 'Open Redirect' vulnerability in the HTML5 scrubber in rrrene htmlsanitizeex allows a remote attacker to force visitors of a page to navigate to a site of the attacker's choosing via a element in sanitized HTML. HtmlSanitizeEx.html5/1 keeps attacker-supplied...

CVE-2026-66829

The CVE concerns html_sanitize_ex (rrrene) with a flaw in html5 scrubber output: attacker-supplied elements are not sanitized, enabling an Open Redirect by navigating the whole document to an attacker-chosen site. The vulnerability affects html_sanitize_ex versions prior to 1.5.3 (from 0.3.1 up to

CVE-2026-66829 html_sanitize_ex HTML5 scrubber keeps attacker-supplied meta refresh, allowing forced cross-origin redirection

URL Redirection to Untrusted Site 'Open Redirect' vulnerability in the HTML5 scrubber in rrrene htmlsanitizeex allows a remote attacker to force visitors of a page to navigate to a site of the attacker's choosing via a element in sanitized HTML. HtmlSanitizeEx.html5/1 keeps attacker-supplied...

EEF-CVE-2026-66829 html_sanitize_ex HTML5 scrubber keeps attacker-supplied meta refresh, allowing forced cross-origin redirection

Summary URL Redirection to Untrusted Site 'Open Redirect' vulnerability in the HTML5 scrubber in rrrene html\sanitize\ex allows a remote attacker to force visitors of a page to navigate to a site of the attacker's choosing via a element in sanitized HTML. HtmlSanitizeEx.html5/1 keeps...

EUVD-2026-54082

URL Redirection to Untrusted Site 'Open Redirect' vulnerability in the HTML5 scrubber in rrrene htmlsanitizeex allows a remote attacker to force visitors of a page to navigate to a site of the attacker's choosing via a element in sanitized HTML. HtmlSanitizeEx.html5/1 keeps attacker-supplied...

CVE-2026-66829 html_sanitize_ex HTML5 scrubber keeps attacker-supplied meta refresh, allowing forced cross-origin redirection

URL Redirection to Untrusted Site 'Open Redirect' vulnerability in the HTML5 scrubber in rrrene htmlsanitizeex allows a remote attacker to force visitors of a page to navigate to a site of the attacker's choosing via a element in sanitized HTML. HtmlSanitizeEx.html5/1 keeps attacker-supplied...

EEF-CVE-2026-66370 html_sanitize_ex HTML5 scrubber keeps attacker-supplied form-association attributes, allowing form hijacking

Summary URL Redirection to Untrusted Site 'Open Redirect' vulnerability in the HTML5 scrubber in rrrene html\sanitize\ex allows an unauthenticated remote attacker to retarget a form already on the rendering page and receive whatever the victim submits, including credentials, via the form and...

Security Bulletin: IBM Maximo Application Suite uses httpcore5-h2-5.3.4.jar which is vulnerable to CVE-2026-54428

Summary IBM Maximo Application Suite uses httpcore5-h2-5.3.4.jar which is vulnerable to CVE-2026-54428. This bulletin contains information regarding the vulnerability and its fixture. Vulnerability Details CVEID:CVE-2026-54428 DESCRIPTION: Allocation of resources without limits or throttling in t...

Security Bulletin: IBM Maximo Application Suite uses httpcore5-5.3.4.jar which is vulnerable to CVE-2026-54399

Summary IBM Maximo Application Suite uses httpcore5-5.3.4.jar which is vulnerable to CVE-2026-54399. This bulletin contains information regarding the vulnerability and its fixture. Vulnerability Details CVEID:CVE-2026-54399 DESCRIPTION: Uncontrolled Resource Consumption vulnerability in the...

EEF-CVE-2026-66843 html_sanitize_ex HTML5 scrubber keeps attacker-supplied `<object>` elements, allowing untrusted content embedding

Summary Inclusion of Functionality from Untrusted Control Sphere vulnerability in the HTML5 scrubber in rrrene html\sanitize\ex allows a remote attacker to load a document of their choosing into a trusted page via the data attribute of an element in sanitized HTML. object is the one URI-bearing...

WebExploitation-Notes

BookSheetCTF - Web Security CheatSheet & Concept Guide Selama...

Security Bulletin: Due to the use of Bouncy Castle Inc. BC-JAVA bcprov IBM webMethods Managed File Transfer is vulnerable to a Covert Timing Channel vulnerability and Use of a Broken or Risky Cryptographic Algorithm vulnerability

Summary Bouncy Castle Inc. BC-JAVA bcprov is used by IBM webMethods Managed File Transfer CVE-2025-14813, CVE-2026-5598, CVE-2026-0636 Vulnerability Details CVEID:CVE-2025-14813 DESCRIPTION: : Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JA...

Security Bulletin: Due to the use of Netty IBM webMethods Managed File Transfer is vulnerable to Improper Access Control and Allocation of Resources without Limits or Throttling

Summary Multiple vulnerabilities in Netty used by IBM webMethods Managed File Transfer have been addressed in MAT11.1ServerFix5 and MAT12.1ServerFix1 Vulnerability Details CVEID:CVE-2026-42580 DESCRIPTION: Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final...

smb-ghost-local-privilege-escalation-exploit

CVE-2020-0796 SMBGhost — Red Team Project ITSOLERA Cyber...

Security Bulletin: Cyber Fraud includes components with multiple known vulnerabilities

Summary Cyber Fraud includes components with known vulnerabilities. These have been addressed in the update. Vulnerability Details CVEID:CVE-2026-59887 DESCRIPTION: linkify-it is a links recognition library with full Unicode support. Prior to 5.0.2, the mailto: schema validator used by .test and...

Adversarial Clothing Designed to Fool Facial Recognition Systems

There are many companies manufacturing adversarial clothing designed to confuse facial recognition systems. It's a cool idea, but I worry that it's mostly security theater: "Our patterns play with that chaos, confuse algorithms and make it way harder to pin you down," he said. Bell, however, said...