CVE-2026-14266

p7zip: 7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability

CVE-2026-14266 is fixed in 10 products on 1 platform, first by DEBIAN-CVE-2026-14266, released July 18, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.8
high
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0074
54th percentile

7-Zip XZ Decompression Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of 7-Zip. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the processing of XZ chunked data. Crafted XZ-compressed data can trigger an overflow of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30169.

Where it's fixed

ProductFixed inFixReleased
Linux
7zip · Debian 12.15 (bookworm) 22.01+really26.02+dfsg-0+deb12u1 DEBIAN-CVE-2026-14266 Jul 18, 2026
7zip · Debian 14 26.02+dfsg-1 DEBIAN-CVE-2026-14266 Jul 18, 2026
7zip · amzn 2023 26.02-17.amzn2023.0.1 ALAS2023-2026-2037 Aug 3, 2026
7zip · opensuse-leap 16.0 26.02-160000.1.1 OPENSUSE-SU-2026:21641-1 Aug 25, 2026
7zip · sles 15.6 26.02-150400.9.9.1 SUSE-SU-2026:3869-1 Aug 28, 2026
7zip · sles 15.7 26.02-150400.9.9.1 SUSE-SU-2026:3869-1 Aug 28, 2026
7zip · sles 16.0 26.02-160000.1.1 SUSE-SU-2026:23317-1 Aug 25, 2026
7zip-debuginfo · amzn 2023 26.02-17.amzn2023.0.1 ALAS2023-2026-2037 Aug 3, 2026
7zip-debugsource · amzn 2023 26.02-17.amzn2023.0.1 ALAS2023-2026-2037 Aug 3, 2026
7zip-reduced · amzn 2023 26.02-17.amzn2023.0.1 ALAS2023-2026-2037 Aug 3, 2026
7zip-reduced-debuginfo · amzn 2023 26.02-17.amzn2023.0.1 ALAS2023-2026-2037 Aug 3, 2026
7zip-standalone · amzn 2023 26.02-17.amzn2023.0.1 ALAS2023-2026-2037 Aug 3, 2026
7zip-standalone-all · amzn 2023 26.02-17.amzn2023.0.1 ALAS2023-2026-2037 Aug 3, 2026
7zip-standalone-all-debuginfo · amzn 2023 26.02-17.amzn2023.0.1 ALAS2023-2026-2037 Aug 3, 2026
7zip-standalone-debuginfo · amzn 2023 26.02-17.amzn2023.0.1 ALAS2023-2026-2037 Aug 3, 2026
p7zip · Debian 12.15 (bookworm) 16.02+really26.02+dfsg-0+deb12u1 DEBIAN-CVE-2026-14266 Jul 18, 2026
p7zip · Debian 13.5 (trixie) 16.02+transitional.1 DEBIAN-CVE-2026-14266 Jul 18, 2026

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