CVE-2019-11740

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-24. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

Mozilla developers and community members reported memory safety bugs present in Firefox 68, Firefox ESR 68, and Firefox 60.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation2% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
2%
EPSS %ILE
75%
KEV
Not listed

Published

September 27, 2019

Last Modified

November 25, 2025

Advisory Details (5)

Auto-updated Aug 15, 2026
No patch confirmed yet.
generic

Security vulnerabilities fixed in Firefox ESR 60.9 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2019-27/
generic

Security vulnerabilities fixed in Firefox ESR 68.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2019-26/
generic

Security vulnerabilities fixed in Firefox 69 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2019-25/
generic

Mozilla Firefox: Multiple vulnerabilities (GLSA 201911-07) — Gentoo security

https://security.gentoo.org/glsa/201911-07
generic

Client Challenge

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1563133%2C1573160

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuxul-ext-lightning (1:60.9.0+build1-0ubuntu0.16.04.2) @ xenial2026-05-27ubuntu
ubuntufirefox-mozsymbols (69.0+build2-0ubuntu0.16.04.4) @ xenial2026-05-27ubuntu
redhatthunderbird-0:60.9.0-1.el7_72019-09-19redhat
redhatthunderbird-0:60.9.0-1.el6_102019-09-19redhat
redhatthunderbird-0:60.9.0-2.el8_02019-09-16redhat
redhatfirefox-0:60.9.0-1.el7_72019-09-12redhat
redhatfirefox-0:60.9.0-1.el6_102019-09-12redhat
redhatfirefox-0:68.1.0-1.el8_02019-09-04redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(14 across 7 ecosystems)
Debian:10(2)
PackageVulnerable rangeFixed inDependents
firefox-esr60.7.2esr-1 ... 60.9.0esr-1~deb9u1 (8 versions)60.9.0esr-1~deb10u1—
thunderbird1:60.7.2-1 ... 1:60.9.0-1~deb9u1 (8 versions)1:60.9.0-1~deb10u1—
Debian:11(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—68.1.0esr-1—
thunderbird—1:60.9.0-1—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—68.1.0esr-1—
thunderbird—1:60.9.0-1—
Debian:13(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—68.1.0esr-1—
thunderbird—1:60.9.0-1—
Debian:14(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—68.1.0esr-1—
thunderbird—1:60.9.0-1—
Debian:8(2)
PackageVulnerable rangeFixed inDependents
firefox-esr45.0.1esr-1 ... 60.8.0esr-1~deb9u1 (151 versions)60.9.0esr-1~deb8u1—
thunderbird1.5-4 ... 1:60.8.0-2 (88 versions)1:60.9.0-1~deb8u1—
Debian:9(2)
PackageVulnerable rangeFixed inDependents
firefox-esr45.9.0esr-1 ... 60.9.0esr-1~deb8u2 (115 versions)60.9.0esr-1~deb9u1—
thunderbird1.5-4 ... 1:60.9.0-1~deb8u1 (89 versions)1:60.9.0-1~deb9u1—

Weakness Classification(2)

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

All Vendor Advisories

(8)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 5× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 148 total refreshes for this CVE.

  1. 2026-09-20 20:10 UTCEPSS rescore
  2. 2026-09-18 19:22 UTCEPSS rescore
  3. 2026-09-17 19:22 UTCEPSS rescore
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  10. 2026-09-08 03:22 UTCOSV refresh
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  25. 2026-08-21 13:44 UTCOSV refresh
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  1. 2026-08-20 22:51 UTCEPSS rescore
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  14. 2026-08-06 00:24 UTCOSV refresh
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  29. 2026-07-23 01:39 UTCEG score recompute
  30. 2026-07-22 22:19 UTCEG score recompute
  31. 2026-07-22 14:05 UTCEPSS rescore
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  35. 2026-07-20 04:46 UTCOSV refresh
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  55. 2026-07-02 21:05 UTCOSV refresh
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  75. 2026-06-21 14:54 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2019-11740?
CVE-2019-11740 is a high vulnerability published on September 27, 2019. Mozilla developers and community members reported memory safety bugs present in Firefox 68, Firefox ESR 68, and Firefox 60.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This…
When was CVE-2019-11740 disclosed?
CVE-2019-11740 was first published in the National Vulnerability Database on September 27, 2019, 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-2019-11740 actively exploited?
CVE-2019-11740 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 24.6% of all scored CVEs.
What is the CVSS score of CVE-2019-11740?
CVE-2019-11740 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2019-11740?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-11740, 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.

Dependency Blast Radius

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