What is CVE-2023-26226?

CVE-2023-26226 is a critical-severity vulnerability in Yandex Browser, classified under Use After Free. CVSS score: 9.8/10. Published 2025-05-30.

How severe is CVE-2023-26226?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Use After Free in Yandex Browser

CVE-2023-26226

A use after free memory corruption issue exists in Yandex Browser for Desktop prior to version 24.4.0.682

Vulnerability class: Use-After-Free

Published 2025-05-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.4th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Yandex Browser — versions 0
Yandex Browser

Weakness classification (CWE)

CWE-416 — Use After Free

References

yandex.com/bugbounty/i/hall-of-fame-browser/ (Vendor Advisory)

Frequently asked questions

What is CVE-2023-26226?: CVE-2023-26226 is a critical-severity vulnerability in Yandex Browser, classified under Use After Free. CVSS score: 9.8/10. Published 2025-05-30.
How severe is CVE-2023-26226?: Critical severity. CVSS v3 base score is 9.8 out of 10.