CVE-2026-95509

Strings optimized for Latin-1 displaying Latin-1 characters cause incorrect String.arg() formatting by an incorrect buffer size calculation, causing out-of-bounds reading.

CVSS 4.0

8.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 23% of CVEs (scores of 2026-10-25)

CWEs

CWE-125, CWE-131

Published

2026-09-29

Modified

2026-09-30

Record from

the NVD, synced 2026-10-19

References

• https://wiki.qt.io/List_of_known_vulnerabilities_in_Qt_products#CVE-2026-95509:

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