Critical severity9.8NVD Advisory· Published Feb 5, 2019· Updated Jun 17, 2026

CVE-2018-18500

Description

A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being freed while still in use, leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 60.5, Firefox ESR < 60.5, and Firefox < 65.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Mozilla Corporation/Firefox3 versions
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <65.0
- cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*range: <60.5
- (no CPE)range: <60.5
Mozilla Corporation/Thunderbird2 versions
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <60.5
- (no CPE)range: <60.5
Canonical/Ubuntu Linux4 versions
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*+ 3 more
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
Debian/linux2 versions
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Red Hat/Enterprise Linux Desktop2 versions
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
Red Hat/Enterprise Linux Server2 versions
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
Red Hat/Enterprise Linux Server Aus
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
Red Hat/Enterprise Linux Eus
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*
Red Hat/Enterprise Linux Server Tus
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
Red Hat/Enterprise Linux Workstation2 versions
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
osv-coords55 versions
pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.0 pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/mozilla-nss&distro=openSUSE%20Leap%2015.0 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Enterprise%20Storage%204 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP3 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSS pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSS pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012-LTSS pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP3 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4 pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%207 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Enterprise%20Storage%204 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP3 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSS pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSS pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012-LTSS pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20OpenStack%20Cloud%207 pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015 pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Package%20Hub%2012 pkg:rpm/suse/mozilla-nss&distro=SUSE%20Enterprise%20Storage%204 pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP3 pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP4 pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015 pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1-LTSS pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-LTSS pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3 pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4 pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2012-LTSS pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1 pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP2 pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3 pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP3 pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP4 pkg:rpm/suse/mozilla-nss&distro=SUSE%20OpenStack%20Cloud%207
< 60.8.0-lp150.3.62.1+ 54 more
- (no CPE)range: < 60.8.0-lp150.3.62.1
- (no CPE)range: < 92.0-1.2
- (no CPE)range: < 91.1.1-1.1
- (no CPE)range: < 128.5.1-1.1
- (no CPE)range: < 3.41.1-lp150.2.20.1
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0-3.24.2
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60.5.0esr-109.58.3
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60-32.5.1
- (no CPE)range: < 60.5.0-3.20.2
- (no CPE)range: < 60.5.1-79.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-3.13.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1
- (no CPE)range: < 3.41.1-58.25.1

Patches

Vulnerability mechanics

References

www.securityfocus.com/bid/106781nvdThird Party AdvisoryVDB Entry
access.redhat.com/errata/RHSA-2019:0218nvdThird Party Advisory
access.redhat.com/errata/RHSA-2019:0219nvdThird Party Advisory
access.redhat.com/errata/RHSA-2019:0269nvdThird Party Advisory
access.redhat.com/errata/RHSA-2019:0270nvdThird Party Advisory
lists.debian.org/debian-lts-announce/2019/01/msg00025.htmlnvdMailing ListThird Party Advisory
lists.debian.org/debian-lts-announce/2019/02/msg00024.htmlnvdMailing ListThird Party Advisory
security.gentoo.org/glsa/201903-04nvdThird Party Advisory
usn.ubuntu.com/3874-1/nvdThird Party Advisory
usn.ubuntu.com/3897-1/nvdThird Party Advisory
www.debian.org/security/2019/dsa-4376nvdThird Party Advisory
www.debian.org/security/2019/dsa-4392nvdThird Party Advisory
www.mozilla.org/security/advisories/mfsa2019-01/nvdVendor Advisory
www.mozilla.org/security/advisories/mfsa2019-02/nvdVendor Advisory
www.mozilla.org/security/advisories/mfsa2019-03/nvdVendor Advisory
lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.htmlnvd
security.gentoo.org/glsa/201904-07nvd

News mentions

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epss	0.010
exploit	0.000
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patch	0.000
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