CVE-2019-11707A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop.
Updated under an hour ago ()
Does this affect you?
It affects Mozilla Firefox ESR and 2 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since May 23, 2022; federal agencies had to remediate by Jun 13, 2022. Treat that date as your deadline.
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A type confusion vulnerability can occur when manipulating JavaScript objects due to issues in Array.pop. This can allow for an exploitable crash. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Firefox ESR < 60.7.1, Firefox < 67.0.3, and Thunderbird < 60.7.2.
- CVSS
- 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-843
- Known exploited
- Added to CISA KEV May 23, 2022; federal remediation due Jun 13, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 37.70% (percentile 99)
- Assigned by
- mozilla
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Mozilla Firefox ESR mozilla:firefox_esr (from the name) | from unspecified before 60.7.1 | CNA record |
Mozilla Firefox mozilla:firefox (from the name) | from unspecified before 67.0.3 | CNA record |
Mozilla Thunderbird mozilla:thunderbird (from the name) | from unspecified before 60.7.2 | CNA record |
mozilla firefox mozilla:firefox | before 60.7.1; before 67.0.3 | NVD |
mozilla thunderbird mozilla:thunderbird | before 60.7.2 | NVD |
References
- https://www.mozilla.org/security/advisories/mfsa2019-20/x-refsource-misc, vendor-advisory
- https://www.mozilla.org/security/advisories/mfsa2019-18/x-refsource-misc, vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1544386x-refsource-misc, issue-tracking, permissions-required, vendor-advisory
- https://security.gentoo.org/glsa/201908-12vendor-advisory, x-refsource-gentoo, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-11707us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.