[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 (70.7% 30-day exploitation probability). Prioritize alongside KEV items. Riskier than 99.4% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-398720.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-436630.37% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 30% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-436760.47% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 39% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-436990.39% 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-2026-437010.55% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-437050.51% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% 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 51% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-437120.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-437130.53% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 43% of all EPSS-scored CVEs.
Referenced CVEs
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownNCSC-2026-0370 [1.00] [M/H] Kwetsbaarheden verholpen in Apple iOS en iPadOSncsc-nl
- high[NEU] [hoch] Apple iOS, iPadOS, macOS Tahoe, macOS Golden Gate, macOS Sequoia und Safari: Mehrere Schwachstell…cert-bund
- high[UPDATE] [hoch] Apple Safari, macOS, iOS und iPadOS: Mehrere Schwachstellencert-bund
- high[UPDATE] [hoch] Apple macOS (Tahoe, Sonoma und Sequoia): Mehrere Schwachstellencert-bund
- medium[UPDATE] [mittel] Apple iOS und iPadOS: Mehrere Schwachstellencert-bund
- unknownApple Products Multiple Vulnerabilitieshkcert
- unknownUSN-8703-1: WebKitGTK vulnerabilitiesubuntu
- 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
- medium[NEW] [medium] Apple Safari: Multiple vulnerabilitiescert-bund
- unknownNCSC-2026-0267 [1.00] [M/H] Vulnerabilities fixed in Apple MacOSncsc-nl
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.
- high[UPDATE] [hoch] WebKitGTK: Schwachstelle ermöglicht Codeausführungcert-bund · 2026-09-15
- high[UPDATE] [hoch] WebKitGTK: Schwachstelle ermöglicht Codeausführungcert-bund · 2026-09-15
- high[UPDATE] [hoch] WebKitGTK: Mehrere Schwachstellencert-bund · 2026-09-14
- medium[UPDATE] [mittel] WebKitGTK: Mehrere Schwachstellencert-bund · 2026-09-04
- highexploited[UPDATE] [hoch] WebKitGTK: Mehrere Schwachstellencert-bund · 2026-09-04
- high[UPDATE] [hoch] WebKitGTK: Mehrere Schwachstellencert-bund · 2026-09-04
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