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CVE-2018-12387

34
FAUCET Score

CVE-2018-12387 is a critical vulnerability affecting Firefox ESR < 60.2.2 and Firefox < 62.0.3, where a flaw in the JavaScript JIT compiler's handling of Array.prototype.push can lead to a memory address leak. This vulnerability has a CVSS score of 9.1 (Critical) due to its network-based attack vector, low attack complexity, and high impact on confidentiality and availability. While the EPSS score indicates a higher than average exploitability probability, there is currently no public exploit code available (Metasploit, Nuclei, ExploitDB), and it is not listed on the CISA KEV catalog. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
7.6CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.1CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.2
CvssVersion
3.0

Exploit Intelligence

EPSS Score
9.59%
Probability of exploitation in next 30 days
EPSS Percentile
95.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0959 is in the 90th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

mozillapatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:60.2.2-1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:60.2.2-1.el7_5
View patch

Vendor Advisories (1)

redhatCVE-2018-12387Critical

Mozilla: stack out-of-bounds read in Array.prototype.push

Oct 2, 2018

References

access.redhat.com / errata/RHSA-2018:2881
Third Party Advisory
access.redhat.com / errata/RHSA-2018:2884
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
ExploitIssue TrackingPatchVendor Advisory
security.gentoo.org / glsa/201810-01
Third Party Advisory
usn.ubuntu.com / 3778-1
Third Party Advisory
debian.org / security/2018/dsa-4310
Third Party Advisory
mozilla.org / security/advisories/mfsa2018-24
Vendor Advisory
securityfocus.com / bid/105460
Third Party AdvisoryVDB Entry
securitytracker.com / id/1041770
Third Party AdvisoryVDB Entry