What is CVE-2026-48103?

CVE-2026-48103 is a medium-severity vulnerability, classified under Out-of-bounds Read. CVSS score: 4.3/10. Published 2026-06-05.

How severe is CVE-2026-48103?

Medium severity. CVSS v3 base score is 4.3 out of 10.

CVE-2026-48103

CVE-2026-48103

7-Zip is a file archiver with a high compression ratio. Versions 9.34 through 26.00 contain an off-by-one heap out-of-bounds read in the WIM (Windows Imaging) archive handler's security descriptor lookup. In CHandler::GetSecurity (CPP/7zip…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

security-advisories@github.com

Frequently asked questions

What is CVE-2026-48103?: CVE-2026-48103 is a medium-severity vulnerability, classified under Out-of-bounds Read. CVSS score: 4.3/10. Published 2026-06-05.
How severe is CVE-2026-48103?: Medium severity. CVSS v3 base score is 4.3 out of 10.