TI-2020-09908 Aliases CVE-2020-12390 GHSA-2hhq-96pp-rf56

Deserialization of untrusted data in Mozilla Firefox

MEDIUM 45CWE-502Published 2020-05-26 · Updated 2024-08-04

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 1 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-502.

Summary

Incorrect origin serialization of URLs with IPv6 addresses could lead to incorrect security checks. This vulnerability affects Firefox < 76.

Why it matters now

EPSS 0.01622 76th percentileScored 2026-11-07

Fix Partial Firefox (Mozilla): 76Red Hat: 1 advisoryRed Hat: 1 fixed, 2 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Mozilla	Firefox	before 76	76	Patch available	CNA

Firefox VendorMozilla Affected before 76 Fixed in 76 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:firefox::::::::	before 76.0	Vulnerable	Mozilla

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 76.0 Vulnerable ·Mozilla

Remediation

Fix · CNA Firefox (Mozilla) Fixed in 76

Red Hat 1 advisory

RHSA-2020:3557 Released 2020-08-26 · Red Hat rating Important
firefox security update
- Red Hat Enterprise Linux AppStream (v. 8) firefox-78.2.0-2.el8_2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2020-05-26
Mozilla Firefox 76
7 records Highest priority Priority MEDIUM 4 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2020-09906 Improper input validation in Mozilla Firefox ESRPriority MEDIUM 49
- TI-2020-09907 Improper input validation in Mozilla Firefox ESRPriority MEDIUM 46
- TI-2020-09914 Out-of-bounds write in Mozilla FirefoxPriority MEDIUM 45
Show all 7 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 5	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux AppStream (v. 8)	Fixed	RHSA-2020:3557

Not affected: 1 product

Red Hat Enterprise Linux 7

Timeline

2026-10-02 Threatist record created from CVE-2020-12390
2026-10-03 Alias added: GHSA-2hhq-96pp-rf56

References

Advisory 1

https://www.mozilla.org/security/advisories/mfsa2020-16/

Other 1

https://bugzilla.mozilla.org/show_bug.cgi?id=1141959

TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8

See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences