CVE-2026-57433 HAARG CVE debrief

Who should care

Users of Storable versions before 3.41 for Perl should be aware of this vulnerability as it could potentially allow attackers to cause a denial of service via a crafted SX_HOOK record. The vulnerability has a high defensive priority, and defenders should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Technical summary

The vulnerability is caused by a signed integer overflow when deserializing a crafted SX_HOOK record in Storable versions before 3.41 for Perl. 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. The affected product is Storable, and the vulnerability has a high defensive priority.

Defensive priority

High

Recommended defensive actions

• Update Storable to version 3.41 or later
• Restrict access to untrusted input
• Monitor for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-07-13T17:17:55.783Z and has not been modified since then. The NVD entry is currently Awaiting Analysis. There is limited information available about the vulnerability, and defenders should verify the affected scope and severity with the vendor. The vulnerability involves a signed integer overflow in Storable versions before 3.41 for Perl when deserializing a crafted SX_HOOK record.

Official resources