[NEW] [medium] WebKitGTK: Multiple vulnerabilities
A remote, anonymous attacker can exploit multiple vulnerabilities in WebKitGTK to disclose information, cause a denial of service, manipulate data, and bypass security precautions.
CSIRTS triage
- What
- Multiple vulnerabilities can disclose information, cause denial of service, manipulate data, and bypass security precautions.
- Who is affected
- Remote, anonymous attackers can exploit these vulnerabilities.
- Urgency
- Remediation is medium urgency due to the potential for exploitation and the variety of impacts.
- Action
- Update to the latest version of WebKitGTK to mitigate these vulnerabilities.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2358
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation likely imminentCVE-2024-4367EPSS puts this in the most-targeted tier (72.6% 30-day exploitation probability). Prioritize alongside KEV items. Riskier than 99.4% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-398720.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-436630.25% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 17% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-436760.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 33% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-436990.29% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-437010.50% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-437050.46% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 38% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-437070.69% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 50% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-437120.36% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 29% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-437130.48% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all EPSS-scored CVEs.
Referenced CVEs
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownUSN-8703-1: WebKitGTK vulnerabilitiesubuntu
- high[NEW] [high] Apple macOS, iOS and iPadOS: Multiple vulnerabilitiescert-bund
- unknownNCSC-2026-0319 [1.00] [M/H] Vulnerabilities resolved in Apple iOS and iPadOSncsc-nl
- unknownApple Products Multiple Vulnerabilitieshkcert
- unknownMultiple vulnerabilities in Apple products (August 18, 2026)cert-fr-avis
- high[NEW] [high] Apple macOS (Tahoe, Sonoma, and Sequoia): Multiple vulnerabilitiescert-bund
- medium[NEW] [medium] Apple Safari: Multiple vulnerabilitiescert-bund
- medium[NEW] [medium] Apple iOS and iPadOS: Multiple vulnerabilitiescert-bund
- unknownNCSC-2026-0267 [1.00] [M/H] Vulnerabilities fixed in Apple MacOSncsc-nl
- unknownNCSC-2026-0266 [1.00] [M/H] Vulnerabilities fixed in Apple iOS and iPadOSncsc-nl
- unknownApple Products Multiple Vulnerabilitieshkcert
- unknownMultiple vulnerabilities in Apple products (July 28, 2026)cert-fr-avis
Recent advisories for WebKitGTK
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- medium[UPDATE] [medium] WebKitGTK: Multiple vulnerabilitiescert-bund · 2026-09-04
- highexploited[UPDATE] [high] WebKitGTK: Multiple vulnerabilitiescert-bund · 2026-09-04
- high[UPDATE] [high] WebKitGTK: Multiple vulnerabilitiescert-bund · 2026-09-04
- highexploited[UPDATE] [high] WebKitGTK: Multiple vulnerabilitiescert-bund · 2026-09-04
- high[UPDATE] [high] WebKitGTK: Multiple vulnerabilitiescert-bund · 2026-09-01
- highCVE-2026-83596: A flaw was found in WebKitGTK. Processing malicious web content can cause memory corruption du…nvd · 2026-08-31
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