Mozilla Firefox up to 115.35.1/140.10.1/150.0.1 Networking use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$5k-$25k0.00

Summaryinfo

A vulnerability described as critical has been identified in Mozilla Firefox up to 115.35.1/140.10.1/150.0.1. Affected by this vulnerability is an unknown functionality of the component Networking. Such manipulation leads to use after free. This vulnerability is documented as CVE-2026-8090. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Mozilla Firefox up to 115.35.1/140.10.1/150.0.1. Affected by this issue is an unknown code block of the component Networking. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Use-after-free in the DOM: Networking component. This vulnerability was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.

The advisory is shared for download at bugzilla.mozilla.org. This vulnerability is handled as CVE-2026-8090 since 05/07/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 07/02/2026).

The vulnerability scanner Nessus provides a plugin with the ID 313180 (Linux Distros Unpatched Vulnerability : CVE-2026-8090), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 115.35.2, 140.10.2 or 150.0.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (313180) and CERT Bund (WID-SEC-2026-1427). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Mozilla Firefox
  • Mozilla Firefox ESR

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.6

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 7.3
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 313180
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-8090

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Firefox 115.35.2/140.10.2/150.0.2

Timelineinfo

05/07/2026 Advisory disclosed
05/07/2026 +0 days CVE reserved
05/07/2026 +0 days VulDB entry created
07/02/2026 +56 days VulDB entry last update

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: bugzilla.mozilla.org
Status: Confirmed

CVE: CVE-2026-8090 (🔒)
GCVE (CVE): GCVE-0-2026-8090
GCVE (VulDB): GCVE-100-361856
CERT Bund: WID-SEC-2026-1427 - Mozilla Firefox und Firefox ESR: Mehrere Schwachstellen

Entryinfo

Created: 05/07/2026 15:22
Updated: 07/02/2026 19:00
Changes: 05/07/2026 15:22 (56), 05/08/2026 19:15 (2), 05/09/2026 09:40 (7), 07/02/2026 19:00 (12)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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