EUVD-2026-34434
GHSA-hgxw-gc4c-8q43
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Primary rating from NVD.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Lifecycle Timeline
4DescriptionCVE.org
Out of bounds read in Skia in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)
AnalysisAI
Cross-origin data leakage in Google Chrome's Skia graphics library prior to version 149.0.7827.53 enables unauthenticated remote attackers to read out-of-bounds memory and exfiltrate data from foreign origins via a crafted HTML page. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N) confirms high confidentiality impact with no privileges required, though a victim must visit an attacker-controlled page to trigger the read. No public exploit code has been identified at time of analysis, and the EPSS score of 0.03% (11th percentile) suggests limited exploitation activity; however, same-origin policy bypass in a mainstream browser is a meaningful web security concern warranting prompt patching.
Technical ContextAI
Skia is Google's open-source 2D graphics rendering library embedded as the primary rendering engine within Chromium-based browsers including Google Chrome. CWE-125 (Out-of-bounds Read) describes a condition where a memory read operation accesses a buffer index beyond its allocated boundary, potentially exposing adjacent memory contents to the caller. In a browser rendering context, this adjacent memory may contain data belonging to other web origins, violating the same-origin policy (SOP) - the cornerstone of web security isolation. The vulnerability arises specifically within the Skia rendering pipeline when processing a specially crafted HTML page, suggesting the OOB read is triggered during graphical parsing or compositing operations. The tag 'Buffer Overflow' in the source data is a slight misnomer; the CWE-125 classification and the description are consistent with a read-only memory safety violation, not a write-based buffer overflow.
RemediationAI
The primary remediation is to update Google Chrome to version 149.0.7827.53 or later, which is confirmed by Google's Stable Channel Update advisory published at https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop.html. Chrome's auto-update mechanism will deliver this patch automatically in most configurations; administrators managing enterprise fleets should verify the update has been applied via policy or endpoint telemetry. For organizations unable to update immediately, restricting access to untrusted or external websites via content filtering proxies reduces exposure, though this has significant usability trade-offs. Enabling Chrome's Site Isolation feature (--site-per-process, which is default in modern Chrome) provides an additional process-level boundary that can limit the practical impact of cross-origin data leakage even if the OOB read is triggered. No additional workarounds specific to disabling the Skia rendering path are feasible without breaking browser functionality.
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Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Information Disclosure
View allVendor StatusVendor
SUSE
Severity: Medium| Product | Status |
|---|---|
| openSUSE Tumbleweed | Fixed |
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External POC / Exploit Code
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