CVE-2026-6305: google chrome Heap-based Buffer Overflow
Vulnerability summary
CVE-2026-6305 is a high (CVSS 8.8) Heap-based Buffer Overflow vulnerability in google chrome. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 27% of scored vulnerabilities.
Not severe (CVSS 8.8, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 3 · Related 4Timeline
- 15-04-2026PublishedVulnerability first disclosed.
- 27-05-2026Last modifiedVulnerability information updated.
Description
Heap buffer overflow in PDFium in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted PDF file. (Chromium security severity: High)
CVSS metrics
4 scores · 4 sources · 1 version- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · AlpineEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.34%
Chance of exploitation in the next 30 days
Percentile
27%
Versus all other CVEs
30-day change
Decrease -0.08 pp
From 0.42% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Alpine1 product
- qt6-qtwebengine< 6.10.3-r2 | < 6.11.0-r4
Chainguard1 product
- chromium< 147.0.7727.101-r0
Debian1 product
- chromium< 147.0.7727.101-1~deb12u1 | < 147.0.7727.101-1~deb13u1 | < 147.0.7727.101-1
Google1 product
- chrome≥ 147.0.7727.101, < 147.0.7727.101 | < 147.0.7727.101
Wolfi1 product
- chromium< 147.0.7727.101-r0
5 vendors · 5 products
References
4 links- chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop_15.htmlRelease NotesVendor Advisory
- issues.chromium.org/issues/496618639Permissions Required
