CVE-2023-5173

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

In a non-standard configuration of Firefox, an integer overflow could have occurred based on network traffic (possibly under influence of a local unprivileged webpage), leading to an out-of-bounds write to privileged process memory. *This bug only affects Firefox if a non-standard preference allowing non-HTTPS Alternate Services (`network.http.altsvc.oe`) is enabled.* This vulnerability affects Firefox < 118.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-190

Affected software

No affected versions have been published.

Timeline

Published
Sep 27, 2023
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2023-5173: High severity, CVSS 7.5 | Vulnix