Mozilla Firefox up to 115.42/153.4/157 IndexedDB 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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7.0$5k-$25k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Mozilla Firefox up to 115.42/153.4/157. This vulnerability affects unknown code of the component IndexedDB. The manipulation results in use after free. This vulnerability is reported as CVE-2026-109706. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 115.42/153.4/157. It has been classified as critical. Affected is some unknown functionality of the component IndexedDB. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Use-after-free in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, and Firefox ESR 153.5.

The advisory is shared for download at bugzilla.mozilla.org. This vulnerability is traded as CVE-2026-109706 since 10/13/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. 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 11/01/2026).

The vulnerability scanner Nessus provides a plugin with the ID 374794 (Rocky Linux 8 [CIQ] Security Update: firefox / firefox-debuginfo / firefox-debugsource Multiple Vulnerabilities (crlsa-2026_89756)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 115.43, 153.5 or 158 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (374794). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

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: 374794
Nessus Name: Rocky Linux 8 [CIQ] Security Update: firefox / firefox-debuginfo / firefox-debugsource Multiple Vulnerabilities (crlsa-2026_89756)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Firefox 115.43/153.5/158

Timelineinfo

10/13/2026 Advisory disclosed
10/13/2026 +0 days CVE reserved
10/13/2026 +0 days VulDB entry created
11/01/2026 +19 days VulDB entry last update

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: bugzilla.mozilla.org
Status: Confirmed

CNA: mozilla
CVE: CVE-2026-109706 (🔒)

GCVE (CVE): GCVE-0-2026-109706
GCVE (VulDB): GCVE-100-417552

Entryinfo

Created: 10/13/2026 15:04
Updated: 11/01/2026 20:32
Changes: 10/13/2026 15:04 (57), 11/01/2026 20:32 (2)
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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