4.3

CVE-2026-78966: google chrome

Analyzed
AliasesDEBIAN-CVE-2026-78966CGA-2w89-49rr-q563CGA-4cqp-wv6f-p98x
Published 25-08-2026Last modified 27-08-2026

Vulnerability summary

CVE-2026-78966 is a medium (CVSS 4.3) vulnerability in google chrome. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 25.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.33%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 4
OPENSUSE-SU-2026:11628-1OPENSUSE-SU-2026:21724-1OPENSUSE-SU-2026:21799-1CGA-R57R-7HJV-QCMC

Timeline

  1. 25-08-2026
    PublishedVulnerability first disclosed.
  2. 27-08-2026
    Last modifiedVulnerability information updated.

Description

Externally controlled reference in QUIC in Google Chrome prior to 152.0.7977.65 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.33%

Chance of exploitation in the next 30 days

Percentile

26%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.33% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard3 products
  • chromium< 152.0.7977.75-r0
  • chromium-docker-selenium-compat< 152.0.7977.75-r0
  • chromium-lang< 152.0.7977.75-r0
Wolfi3 products
  • chromium< 152.0.7977.75-r0
  • chromium-docker-selenium-compat< 152.0.7977.75-r0
  • chromium-lang< 152.0.7977.75-r0
Debian1 product
  • chromium< 152.0.7977.75-1~deb12u1 | < 152.0.7977.75-1~deb13u1 | < 152.0.7977.64-1
Google1 product
  • chrome≥ 152.0.7977.65, < 152.0.7977.65 | < 152.0.7977.65

4 vendors · 8 products

References

3 links