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

> A signed integer overflow in Perl's Storable library allows attackers to cause a denial of service via crafted serialized data.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 13 Jul 2026
- **Updated:** 14 Jul 2026
- **Also known as:** AZL-92415, CLSA-2026-1788175535, CLSA-2026-1788175793, CLSA-2026-1788194548, DEBIAN-CVE-2026-57433, ECHO-d227-33d7-30bd, GHSA-r969-gf4c-xqf7, ROOT-OS-DEBIAN-11-CVE-2026-57433, UBUNTU-CVE-2026-57433

## What is CVE-2026-57433?

CVE-2026-57433 is a critical vulnerability in HAARG Storable, published on 13 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### 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.

Weakness: CWE-190 (Integer Overflow or Wraparound)

## Which versions are affected by CVE-2026-57433?

It affects 1 product.


Products: Nwclark Storable.

## How do I fix CVE-2026-57433?

Upgrade to a fixed version.

## Is CVE-2026-57433 being exploited?

There is no known exploitation of CVE-2026-57433 in the wild and no public exploit code.

## Other vulnerabilities in HAARG Storable

- [CVE-2017-20230](https://insights.sbomify.com/CVE-2017-20230/): Storable versions before 3.05 for Perl has a stack overflow (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-57433 and fix it if it is affected.

What it is: CVE-2026-57433 is a critical vulnerability in HAARG Storable, published on 13 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-57433 in the wild and no public exploit code.

Affected product: HAARG Storable. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-57433/ (Markdown: https://insights.sbomify.com/CVE-2026-57433/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-57433
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-57433
- OSV: https://osv.dev/vulnerability/CVE-2026-57433

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-57433/
Summaries are generated and may contain mistakes; the official description above is the record.