Vulnerability · Published Jul 13, 2026 · Assigned by CPANSec
CVE-2026-57433Storable versions before 3.41 for Perl have a signed integer overflow when deserializing a crafted SX_HOOK record
Critical 9.8
In plain English
A critical-severity integer overflow in Storable from HAARG. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Storable versions before 3.41 for Perl have a signed integer overflow when deserializing a crafted SX_HOOK record. retrieve_hook_common reads a signed 32-bit item count from an SX_HOOK record and calls av_extend with that count plus one. A count of I32_MAX wraps the addition to a negative value. A crafted blob passed to thaw or retrieve triggers the overflow; av_extend receives the negative count and dies with a panic, terminating the deserialization.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | perl | 5.42.3-r0 | ALPINE-CVE-2026-57433 |
| Debian:12 | perl | 5.36.0-7+deb12u4 | DEBIAN-CVE-2026-57433 |
| Debian:13 | perl | 5.40.1-6+deb13u1 | DEBIAN-CVE-2026-57433 |
| Debian:14 | perl | 5.40.1-8 | DEBIAN-CVE-2026-57433 |
| Ubuntu:22.04:LTS | perl | 5.34.0-3ubuntu1.8 | UBUNTU-CVE-2026-57433 |
| Ubuntu:22.04:LTS | perl | 5.34.0-3ubuntu1.8 | USN-8675-1 |
| Ubuntu:24.04:LTS | perl | 5.38.2-3.2ubuntu0.4 | USN-8684-1 |
| Ubuntu:24.04:LTS | perl | 5.38.2-3.2ubuntu0.4 | UBUNTU-CVE-2026-57433 |
| Ubuntu:26.04:LTS | perl | 5.40.1-7ubuntu0.3 | USN-8675-2 |
| Ubuntu:26.04:LTS | perl | 5.40.1-7ubuntu0.3 | UBUNTU-CVE-2026-57433 |
Affected products (as reported)
Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H