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High [CVE-2026-12455] Use after free in Tab Strip
Use after free in Tab Strip in Google Chrome prior to 149.0.7827.155 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High) An use after free flaw was found in the Tab Strip component of the Chromium browser. Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-825.
High [CVE-2026-12456] Insufficient validation of untrusted input in Extensions
Inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.155 allowed an attacker who convinced a user to install a malicious extension to bypass same origin policy via a crafted Chrome Extension. (Chromium security severity: High) An insufficient validation of untrusted input flaw was found in the Extensions component of the Chromium browser. Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N). Weakness: CWE-346.
High [CVE-2026-12454] Race in Safe Browsing
Race in Safe Browsing in Google Chrome on Mac prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High) Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.3 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H). Weakness: CWE-368.
High [CVE-2026-12451] Use after free in DigitalCredentials
Use after free in DigitalCredentials in Google Chrome prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High) Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.3 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H). Weakness: CWE-825.
High [CVE-2026-12452] Use after free in Downloads
Use after free in Downloads in Google Chrome on Android prior to 149.0.7827.155 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High) An use after free flaw was found in the Downloads component of the Chromium browser. Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-825.
High [CVE-2026-12448] Inappropriate implementation in WebView
Inappropriate implementation in WebView in Google Chrome on Android prior to 149.0.7827.155 allowed a remote attacker to perform privilege escalation via a crafted HTML page. (Chromium security severity: High) An inappropriate implementation flaw was found in the WebView component of the Chromium browser. Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-266.
High [CVE-2026-12449] Use after free in Chromoting
Use after free in Chromoting in Google Chrome on Windows prior to 149.0.7827.155 allowed a local attacker to perform OS-level privilege escalation via a malicious file. (Chromium security severity: High) An use after free flaw was found in the Chromoting component of the Chromium browser. Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-825.
High [CVE-2026-12447] Heap buffer overflow in WebRTC
Heap buffer overflow in WebRTC in Google Chrome prior to 149.0.7827.155 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High) A heap buffer overflow flaw was found in the WebRTC component of the Chromium browser. Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-131.
High [CVE-2026-12445] Use after free in Extensions
Use after free in Extensions in Google Chrome prior to 149.0.7827.155 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted Chrome Extension. (Chromium security severity: High) An use after free flaw was found in the Extensions component of the Chromium browser. Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H). Weakness: CWE-825.
High [CVE-2026-12443] Use after free in Web Authentication
Use after free in Web Authentication in Google Chrome prior to 149.0.7827.155 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical) An use after free flaw was found in the Web Authentication component of the Chromium browser. Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-825.
High [CVE-2026-12442] Use after free in Passwords
Use after free in Passwords in Google Chrome on Android prior to 149.0.7827.155 allowed a remote attacker to execute arbitrary code via a crafted HTML page. (Chromium security severity: Critical) An use after free flaw was found in the Passwords component of the Chromium browser. Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-825.
High [CVE-2026-12441] Use after free in File Input
Use after free in File Input in Google Chrome on Linux prior to 149.0.7827.155 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical) An use after free flaw was found in the File Input component of the Chromium browser. Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-825.
High [CVE-2026-12440] Use after free in DigitalCredentials
Use after free in DigitalCredentials in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical) An use after free flaw was found in the DigitalCredentials component of the Chromium browser. Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-825.
High [CVE-2026-12438] Inappropriate implementation in WebView
Inappropriate implementation in WebView in Google Chrome on Android prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical) Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.3 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H). Weakness: CWE-653.
High [CVE-2026-12439] Use after free in Digital Credentials
Use after free in Digital Credentials in Google Chrome prior to 149.0.7827.155 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: Critical) An use after free flaw was found in the Digital Credentials component of the Chromium browser. Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-825.
High [CVE-2026-12437] Use after free in WebShare
Use after free in WebShare in Google Chrome on Windows prior to 149.0.7827.155 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical) Upstream bug(s): Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory. Red Hat severity: Important — CVSS 8.3 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H). Weakness: CWE-825.
Medium [CVE-2026-12515] missing repository authorization in content_uploads exposes cross-product content existence
A flaw was found in Katello's of Red Hat Satellite. A content upload functionality where insufficient authorization checks in the ContentUploadsController allowed users with the edit_products permission to query content information for repositories outside the products they were authorized to manage. An authenticated attacker could exploit this issue to determine whether specific content exists within repositories that should otherwise be inaccessible. This issue does not allow unauthorized modification, import, or publication of content. Affected products named by the advisory: Red Hat Satellite 6.16 for RHEL 8; Red Hat Satellite 6.16 for RHEL 9; Red Hat Satellite 6.17 for RHEL 9; Red Hat Satellite 6.18 for RHEL 9; and 2 more. Affected products named by the advisory: Red Hat Satellite 6.19 for RHEL 9.
High [CVE-2026-12326] Memory safety bugs fixed in Firefox 152 and Thunderbird 152
Memory safety bugs present in Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 152 and Thunderbird 152. Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-825. Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 as not affected.
Medium [CVE-2026-9798] brute-force protection bypass in ciba flow
A flaw was found in Keycloak, an open-source identity and access management solution. When a user account is temporarily locked due to repeated failed login attempts, an attacker with valid client credentials can exploit the Client-Initiated Backchannel Authentication (CIBA) flow to bypass this brute-force protection. This allows continued authentication attempts and token issuance even when the account should be locked, potentially enabling further unauthorized access attempts. Affected products named by the advisory: Red Hat build of Keycloak 26.4; Red Hat build of Keycloak 26.6.
Medium [CVE-2026-9793] security policy bypass in jwe-encrypted request object processing
A flaw was found in Keycloak. When a JSON Web Encryption (JWE) encrypted request object is submitted, Keycloak may incorrectly process unsigned claims if the decrypted content is raw JSON, bypassing the configured signature policy. This allows a remote attacker to submit unauthorized claims, leading to a compromise of data integrity within the OpenID Connect (OIDC) authorization flow. While a redirect URI allowlist acts as a compensating control, this vulnerability violates OIDC Core and Financial-grade API (FAPI) signing requirements. Affected products named by the advisory: Red Hat build of Keycloak 26.4; Red Hat build of Keycloak 26.6.