---
title: "CVE-2026-100810: CVE-2026-100810"
description: "Other issue in the DevTools component. This vulnerability was fixed in Thunderbird 157 and Firefox 157."
url: https://panop.io/threat-heartbeat/CVE-2026-100810/
---

# CVE-2026-100810 CVE-2026-100810

Other issue in the DevTools component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.

CVSS base score 9.8 /10

Critical

CISA KEV

Not listed

Public exploit

None known

EPSS

0.38% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-100810)

## Details

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

29 September 2026

Updated

15 October 2026

Weakness

[CWE-200](https://cwe.mitre.org/data/definitions/200.html)

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-100810](https://nvd.nist.gov/vuln/detail/CVE-2026-100810)
- [https://bugzilla.mozilla.org/show\_bug.cgi?id=2064034](https://bugzilla.mozilla.org/show_bug.cgi?id=2064034)
- [https://www.mozilla.org/security/advisories/mfsa2026-97/](https://www.mozilla.org/security/advisories/mfsa2026-97/)
- [https://www.mozilla.org/security/advisories/mfsa2026-101/](https://www.mozilla.org/security/advisories/mfsa2026-101/)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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