8.8

CVE-2026-9939: google chrome Heap-based Buffer Overflow

CVSS: 8.8v3.1HighAnalyzed
AliasesDEBIAN-CVE-2026-9939CGA-mj3v-3m5h-3hm5CGA-w975-284m-7pg2
Published 28-05-2026Last modified 30-05-2026
Open JSON

Vulnerability summary

CVE-2026-9939 is a high (CVSS 8.8) Heap-based Buffer Overflow vulnerability in google chrome. EPSS estimates a 0.57% chance of exploitation in the next 30 days, higher than 46.5% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.57%
0%100%
Low · +0.16 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 3
OPENSUSE-SU-2026:10906-1OPENSUSE-SU-2026:20849-1CGA-C9R2-FRX5-C2H8

Timeline

  1. 28-05-2026
    PublishedVulnerability first disclosed.
  2. 30-05-2026
    Last modifiedVulnerability information updated.

Description

Heap buffer overflow in WebCodecs in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.57%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

+0.16 pp

From 0.41% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.57%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard1 product
  • chromium< 149.0.7827.53-r0
Debian1 product
  • chromium< 148.0.7778.215-1~deb12u1 | < 148.0.7778.215-1~deb13u1 | < 148.0.7778.215-1
Google1 product
  • chrome≥ 148.0.7778.216, < 148.0.7778.216 | < 148.0.7778.216 | < 148.0.7778.215
Wolfi1 product
  • chromium< 149.0.7827.53-r0

4 vendors · 4 products

References

3 links