CVE-2026-22184
7.8
HIGH
CVSS 3.1
EPSS 0.01%
Description
zlib versions up to and including 1.3.1.2 include a global buffer overflow in the untgz utility located under contrib/untgz. The vulnerability is limited to the standalone demonstration utility and does not affect the core zlib compression library. The flaw occurs when a user executes the untgz command with an excessively long archive name supplied via the command line, leading to an out-of-bounds write in a fixed-size global buffer.
How to fix CVE-2026-22184
To remediate CVE-2026-22184, upgrade the affected package to a fixed version below.
- —upgrade to 1.3.2-r0 or later
- —upgrade to 1:1.2.6.dfsg-1 or later
Is CVE-2026-22184 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.3.2-r0
- from 0, < 1:1.2.6.dfsg-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |