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Vulnerability details: VCID-5jj9-nfx6-kue6
Vulnerability ID VCID-5jj9-nfx6-kue6
Aliases CVE-2019-9793
Summary A mechanism was discovered that removes some bounds checking for string, array, or typed array accesses if Spectre mitigations have been disabled. This vulnerability could allow an attacker to create an arbitrary value in compiled JavaScript, for which the range analysis will infer a fully controlled, incorrect range in circumstances where users have explicitly disabled Spectre mitigations. *Note: Spectre mitigations are currently enabled for all users by default settings.*
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
System Score Found at
cvssv3 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-9793.json
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.00314 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.0033 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.0033 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
epss 0.0033 https://api.first.org/data/v1/epss?cve=CVE-2019-9793
cvssv3 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2019-9793
cvssv3 5.9 https://nvd.nist.gov/vuln/detail/CVE-2019-9793
archlinux Critical https://security.archlinux.org/AVG-925
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-07
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-08
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2019-11
Reference id Reference type URL
https://access.redhat.com/errata/RHSA-2019:0966
https://access.redhat.com/errata/RHSA-2019:1144
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-9793.json
https://api.first.org/data/v1/epss?cve=CVE-2019-9793
https://bugzilla.mozilla.org/show_bug.cgi?id=1528829
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18506
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9788
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9790
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9791
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9792
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9793
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9795
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9796
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.mozilla.org/security/advisories/mfsa2019-07/
https://www.mozilla.org/security/advisories/mfsa2019-08/
https://www.mozilla.org/security/advisories/mfsa2019-11/
1690678 https://bugzilla.redhat.com/show_bug.cgi?id=1690678
ASA-201903-11 https://security.archlinux.org/ASA-201903-11
AVG-925 https://security.archlinux.org/AVG-925
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
CVE-2019-9793 https://nvd.nist.gov/vuln/detail/CVE-2019-9793
mfsa2019-07 https://www.mozilla.org/en-US/security/advisories/mfsa2019-07
mfsa2019-08 https://www.mozilla.org/en-US/security/advisories/mfsa2019-08
mfsa2019-11 https://www.mozilla.org/en-US/security/advisories/mfsa2019-11
USN-3918-1 https://usn.ubuntu.com/3918-1/
USN-3918-2 https://usn.ubuntu.com/3918-2/
USN-3927-1 https://usn.ubuntu.com/3927-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2019-9793.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-9793
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2019-9793
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.53987
EPSS Score 0.00314
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:56.755981+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2019/mfsa2019-07.yml 37.0.0