High severity8.8NVD Advisory· Published Apr 26, 2019· Updated Jun 17, 2026
CVE-2019-9813
CVE-2019-9813
Description
Incorrect handling of __proto__ mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and write. This vulnerability affects Firefox < 66.0.1, Firefox ESR < 60.6.1, and Thunderbird < 60.6.1.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
31cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <60.6.1
- (no CPE)range: <66.0.1
- (no CPE)range: unspecified
- (no CPE)range: unspecified
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <60.6.1
- (no CPE)range: <60.6.1
- (no CPE)range: unspecified
- osv-coords24 versionspkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.0pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.0pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Enterprise%20Storage%204pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%207pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Package%20Hub%2012
< 60.6.1-lp150.3.45.1+ 23 more
- (no CPE)range: < 60.6.1-lp150.3.45.1
- (no CPE)range: < 92.0-1.2
- (no CPE)range: < 60.6.1-lp150.3.37.1
- (no CPE)range: < 91.1.1-1.1
- (no CPE)range: < 128.5.1-1.1
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1-3.29.3
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1esr-109.63.2
- (no CPE)range: < 60.6.1-3.28.1
- (no CPE)range: < 60.6.1-82.1
Patches
Vulnerability mechanics
References
6- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions RequiredVendor Advisory
- www.mozilla.org/security/advisories/mfsa2019-09/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2019-10/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2019-12/nvdVendor Advisory
- access.redhat.com/errata/RHSA-2019:0966nvd
- access.redhat.com/errata/RHSA-2019:1144nvd
News mentions
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