CVE-2026-57433: Storable versions before 3.41 for Perl have a signed integer overflow when deserializing a crafted SX_HOOK record

criticalCVSS 9.8CVE-2026-57433

CSIRTS triage

vendor: Perl product: Storable Unsafe deserializationaffected: before 3.41

What: There is a signed integer overflow when deserializing a crafted SX_HOOK record.
Who is affected: Users of Storable versions before 3.41 are affected.
Urgency: Remediation is critical due to the critical severity of the vulnerability.
Action: Upgrade to Storable version 3.41 or later.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: critical — CVSS 9.8
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57433

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-574330.36% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 28% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-57433	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

criticalCVE-2026-57433: Storable versions before 3.41 for Perl have a signed integer overflow when deserializing a cra…nvd

Recent advisories for Storable

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalCVE-2026-57433: Storable versions before 3.41 for Perl have a signed integer overflow when deserializing a cra…nvd · 2026-07-13