SB2026081824 - Multiple vulnerabilities in WebKitGTK+ and WPE WebKit
Published: August 18, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 18 vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2026-64715)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a use-after-free error when processing untrusted web content in WebKit. A remote attacker can trick the victim into visiting a malicious website and crash the browser.
2) Memory corruption (CVE-ID: CVE-2026-65338)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in WebKit. A remote attacker can trick the victim into opening a specially crafted file and perform an unexpected Safari crash.
3) Memory corruption (CVE-ID: CVE-2026-43795)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in WebKit. A remote attacker can trick the victim into opening a specially crafted file and perform an unexpected Safari crash.
4) Memory corruption (CVE-ID: CVE-2026-28984)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in WebKit. A remote attacker can trick the victim into opening a specially crafted file and perform an unexpected Safari crash.
5) Information disclosure (CVE-ID: CVE-2026-64778)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output in WebKit History. A remote attacker can gain unauthorized access to sensitive information.
6) Use-after-free (CVE-ID: CVE-2026-64787)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a use-after-free error when processing untrusted web content in WebKit. A remote attacker can trick the victim into visiting a malicious website and crash the browser.
7) Buffer overflow (CVE-ID: CVE-2026-43794)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in WebKit. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and execute arbitrary code on the target system.
8) Buffer overflow (CVE-ID: CVE-2026-65334)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a boundary error in WebKit when processing untrusted web content. A remote attacker can trick the victim into visiting a malicious website and crash the browser.
9) Input validation error (CVE-ID: CVE-2026-64780)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input in WebKit. A remote attacker can trick the victim into visiting a malicious website and crash the browser.
10) State Issues (CVE-ID: CVE-2026-65332)
CWE-ID: CWE-371 - State Issues
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a state issue when processing untrusted web content in WebKit. A remote attacker can trick the victim into visiting a specially crafted website and crash the browser.
11) Buffer overflow (CVE-ID: CVE-2026-64779)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a boundary error in WebKit Storage. A remote attacker can trick the victim into visiting a specially crafted website and rash the browser.
12) State Issues (CVE-ID: CVE-2026-65331)
CWE-ID: CWE-371 - State Issues
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a state issue when processing untrusted web content in WebKit. A remote attacker can trick the victim into visiting a specially crafted website and crash the browser.
13) State Issues (CVE-ID: CVE-2026-65333)
CWE-ID: CWE-371 - State Issues
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a state issue when processing untrusted web content in WebKit. A remote attacker can trick the victim into visiting a specially crafted website and crash the browser.
14) State Issues (CVE-ID: CVE-2026-65335)
CWE-ID: CWE-371 - State Issues
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a state issue when processing untrusted web content in WebKit. A remote attacker can trick the victim into visiting a specially crafted website and crash the browser.
15) State Issues (CVE-ID: CVE-2026-65336)
CWE-ID: CWE-371 - State Issues
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a state issue when processing untrusted web content in WebKit. A remote attacker can trick the victim into visiting a specially crafted website and crash the browser.
16) State Issues (CVE-ID: CVE-2026-65337)
CWE-ID: CWE-371 - State Issues
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a state issue when processing untrusted web content in WebKit. A remote attacker can trick the victim into visiting a specially crafted website and crash the browser.
17) State Issues (CVE-ID: CVE-2026-65340)
CWE-ID: CWE-371 - State Issues
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a state issue when processing untrusted web content in WebKit. A remote attacker can trick the victim into visiting a specially crafted website and crash the browser.
18) State Issues (CVE-ID: CVE-2026-65351)
CWE-ID: CWE-371 - State Issues
CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to crash the browser.
The vulnerability exists due to a state issue when processing untrusted web content in WebKit. A remote attacker can trick the victim into visiting a specially crafted website and crash the browser.
Remediation
Install update from vendor's website.