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Fencer Vulns
high 8.8

CVE-2026-6303 json

Use after free in Codecs in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to execute arbitrary code inside a sandbox via…

published 2026-04-15 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-23048

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 31%
public exploits
0
none known

Summary

Use after free in Codecs in Google Chrome prior to 147.0.7727.101 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

Patch / fix

  • google chrome 147.0.7727.101
  • chromium Debian 12 147.0.7727.101-1~deb12u1
  • chromium Debian 13 147.0.7727.101-1~deb13u1
  • chromium Debian 14 147.0.7727.101-1

debian advisories DEBIAN-CVE-2026-6303

  • chromium openSUSE Leap 16.0 147.0.7727.137-bp160.1.1
  • chromium openSUSE Tumbleweed 147.0.7727.101-1.1

opensuse advisories openSUSE-SU-2026:20660-1openSUSE-SU-2026:10572-1

  • qt6-qtwebengine Alpine 3.23 6.10.3-r2
  • qt6-qtwebengine Alpine 3.24 6.11.0-r4

alpine advisories ALPINE-CVE-2026-6303

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-6303 updated cvss 9.6

chromium-browser: Use after free in Codecs

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
6 mo ago

Exploit prediction

0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Google Chrome

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.