Memory Safety Vulnerability in Firefox 152
CVE-2026-12317 Published on June 16, 2026
Memory safety bug fixed in Firefox 152
Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
Vulnerability Analysis
CVE-2026-12317 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Buffer Overflow Vulnerability?
The software performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer.
CVE-2026-12317 has been classified to as a Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2026-12317
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Affected Versions
Mozilla Firefox:- Version 152, <= * is unaffected.
- Version 152, <= * is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.