No Privileges, No Lockout, No Trace: Kerberoasting with SPN Misconfigurations

No Privileges, No Lockout, No Trace: Kerberoasting with SPN Misconfigurations By Maulik Maheta and Henry Bernabe · August 27, 2026 Executive Summary Active Directory misconfigurations are vulnerabilities that attackers can exploit before defenders notice them. This blog exposes a stealthier...

PT-2026-82837

Name of the Vulnerable Software and Affected Versions WPMU DEV Dashboard versions prior to 5.0.2 Description An authentication bypass exists in the Hub Single Sign-On SSO flow, potentially affecting an estimated 350,000 WordPress sites. The issue stems from HMAC canonicalization confusion—a...

VulnCheck KEV: CVE-2026-76581

The WPMU DEV Dashboard plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 5.0.1. This is due to inconsistent and ambiguous HMAC message construction between the unauthenticated wdpssostep1 and wdpssostep2 AJAX actions, where step 1 signs and disclose...

CVE-2026-74752

In the Linux kernel, the following vulnerability has been resolved: sctp: validate cookie AUTH state before use When cookie authentication is disabled, COOKIEECHO restores fixed-size AUTH fields directly from peer-controlled cookie bytes. A forged RANDOM length, HMAC list, or CHUNKS list can then...

CVE-2026-12587

The vulnerability allows the unauthorised generation of physical access QR codes due to the use of hard-coded credentials within the application. The generation mechanism uses the 'badgenumber' parameter as the HMAC private key, the value of which remains static and is accessible via the API usin...

CVE-2026-12587 Embedded credentials in Virtuagym

The vulnerability allows the unauthorised generation of physical access QR codes due to the use of hard-coded credentials within the application. The generation mechanism uses the 'badgenumber' parameter as the HMAC private key, the value of which remains static and is accessible via the API usin...

CVE-2026-12587

CVE-2026-12587 affects the Virtuagym application, where a static, hard-coded badge_number parameter is used as the HMAC private key for generating physical access QR codes. This value is exposed via the API endpoint /club/_id_club_/member/_id_member_/resamania_qr_info, and the cryptographic logic...

CVE-2026-75977

The Mang Board WP plugin for WordPress is vulnerable to Missing Authorization via Authentication Cookie Forgery in all versions up to, and including, 2.3.7. This is due to flawed HMAC generation in the mbwgethashkey function that uses the current user's identity instead of the cookie username...

CVE-2026-75977 Mang Board WP <= 2.3.7 - Authenticated (Subscriber+) Privilege Escalation to Forged Authentication Cookie

The Mang Board WP plugin for WordPress is vulnerable to Missing Authorization via Authentication Cookie Forgery in all versions up to, and including, 2.3.7. This is due to flawed HMAC generation in the mbwgethashkey function that uses the current user's identity instead of the cookie username...

EUVD-2026-66335

The Mang Board WP plugin for WordPress is vulnerable to Missing Authorization via Authentication Cookie Forgery in all versions up to, and including, 2.3.7. This is due to flawed HMAC generation in the mbwgethashkey function that uses the current user's identity instead of the cookie username...

CVE-2026-75977

Mang Board WP WordPress plugin (all versions ≤ 2.3.7 ) suffers from a Missing Authorization vulnerability via authentication cookie forgery. The root cause is flawed HMAC generation in mbw_get_hash_key(), which uses the current user's identity instead of the cookie's username parameter when a Wor...

CVE-2026-55663 mediasoup: SCTP state cookie lacks cryptographic authentication, enabling unauthorized association establishment (RFC 9260 violation)

mediasoup is a WebRTC video conferencing system. From version 3.20.0 until 3.20.6 for the npm package and from 0.22.0 until 0.22.5 for the Rust crate, mediasoup's built-in SCTP stack authenticates state cookies using only the hardcoded msworker and 0xAD81 magic values instead of a per-instance...

CVE-2026-55663 mediasoup: SCTP state cookie lacks cryptographic authentication, enabling unauthorized association establishment (RFC 9260 violation)

mediasoup is a WebRTC video conferencing system. From version 3.20.0 until 3.20.6 for the npm package and from 0.22.0 until 0.22.5 for the Rust crate, mediasoup's built-in SCTP stack authenticates state cookies using only the hardcoded msworker and 0xAD81 magic values instead of a per-instance...

CVE-2026-77140

The extension validates the HMAC of a frontend employee edit link only in the action that renders the edit form, not in the action that persists the change. An unauthenticated visitor who knows the UID of a visible employee record can send a direct POST request to the update action and overwrite...

CVE-2026-77140

TYPO3 extension Telephone Directory (telephonedirectory) suffers from a Broken Access Control flaw. The extension validates the HMAC of a frontend employee edit link only in the action that renders the edit form, but not in the action that persists the change. As a result, an unauthenticated visi...

EUVD-2026-65336

The extension validates the HMAC of a frontend employee edit link only in the action that renders the edit form, not in the action that persists the change. An unauthenticated visitor who knows the UID of a visible employee record can send a direct POST request to the update action and overwrite...

CVE-2026-77140 Broken Access Control in extension "Telephone Directory" (telephonedirectory)

The extension validates the HMAC of a frontend employee edit link only in the action that renders the edit form, not in the action that persists the change. An unauthenticated visitor who knows the UID of a visible employee record can send a direct POST request to the update action and overwrite...

CVE-2026-76847

act starts an HTTP Artifacts V4 backend whenever a workflow uses actions/upload-artifact@v4 or actions/download-artifact@v4. The control-plane RPCs of that backend, including CreateArtifact, GetSignedArtifactURL, ListArtifacts, FinalizeArtifact and DeleteArtifact, accept a caller-supplied...

CVE-2026-76847 act 0.2.81 through 0.2.89 Missing Authorization in the Artifacts V4 Backend

act starts an HTTP Artifacts V4 backend whenever a workflow uses actions/upload-artifact@v4 or actions/download-artifact@v4. The control-plane RPCs of that backend, including CreateArtifact, GetSignedArtifactURL, ListArtifacts, FinalizeArtifact and DeleteArtifact, accept a caller-supplied...

CVE-2026-76847

act (nektos/act) versions 0.2.81 through 0.2.89 are affected by a missing authorization flaw in the Artifacts V4 backend , which is started whenever a workflow uses actions/upload-artifact@v4 or actions/download-artifact@v4. Three compounding issues enable unauthenticated artifact access: (1) val...