CVE-2016-9899

CRITICALNVD 9.8

9.8

Use-after-free while manipulating DOM events and removing audio elements due to errors in the handling of node adoption. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.

CVSS v3: 9.8
EG Score: —
EPSS: 97.2%
KEV: Not listed

Published

June 11, 2018

Last Modified

November 25, 2025

References (22)

security@mozillahttp://rhn.redhat.com/errata/RHSA-2016-2946.html
security@mozillahttp://rhn.redhat.com/errata/RHSA-2016-2973.html
security@mozillahttp://www.securityfocus.com/bid/94885
security@mozillahttp://www.securitytracker.com/id/1037461
security@mozillahttps://bugzilla.mozilla.org/show_bug.cgi?id=1317409
security@mozillahttps://security.gentoo.org/glsa/201701-15
security@mozillahttps://www.debian.org/security/2017/dsa-3757
security@mozillahttps://www.exploit-db.com/exploits/41042/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2016-94/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2016-95/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2016-96/
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-2946.html
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-2973.html
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/94885
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1037461

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-416Use After Free

Data Freshness Timeline

(refreshed 4× in last 7d / 4× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 08:21 UTCOSV refresh

Frequently asked(5)

What is CVE-2016-9899?

CVE-2016-9899 is a critical vulnerability published on June 11, 2018. Use-after-free while manipulating DOM events and removing audio elements due to errors in the handling of node adoption. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.

When was CVE-2016-9899 disclosed?

CVE-2016-9899 was first published in the National Vulnerability Database on June 11, 2018, with the most recent update on November 25, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2016-9899 actively exploited?

CVE-2016-9899 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 97.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2016-9899?

CVE-2016-9899 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2016-9899?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-9899, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2016-9899

📅 Published

🔄 Last Modified

🔗 References (22)