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Fencer Vulns
medium 4.3

CVE-2026-78954 json

Incorrect authorization in Extensions in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer pr…

published 2026-08-25 2 mo ago modified 2026-08-28 2 mo ago also EUVD-2026-65817

cvss
4.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits
0
none known

Summary

Incorrect authorization in Extensions in Google Chrome prior to 152.0.7977.65 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. (Chromium security severity: High)

Patch / fix

  • google chrome 152.0.7977.65
  • chromium Debian 12 152.0.7977.75-1~deb12u1
  • chromium Debian 13 152.0.7977.75-1~deb13u1
  • chromium Debian 14 152.0.7977.64-1

debian advisories DEBIAN-CVE-2026-78954

  • chromium openSUSE Leap 16.0 152.0.7977.82-bp160.1.1
  • chromium openSUSE Tumbleweed 152.0.7977.64-1.1

opensuse advisories openSUSE-SU-2026:21799-1openSUSE-SU-2026:11628-1

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-2026-78954 updated cvss 8.7

chromium-browser: Google Chrome Extensions: Web origin policy bypass via incorrect authorization

  • 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
partial
Assessed
2 mo ago

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CNA 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

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.