CVE-2017-7813
CVSS v3
8.2
HIGH
EPSS Score
1.6 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Inside the JavaScript parser, a cast of an integer to a narrower type can result in data read from outside the buffer being parsed. This usually results in a non-exploitable crash, but can leak a limited amount of information from memory if it matches JavaScript identifier syntax. This vulnerability affects Firefox < 56.
Technical details
- Published
- 2018-06-11
Frequently asked questions
What is CVE-2017-7813?
Inside the JavaScript parser, a cast of an integer to a narrower type can result in data read from outside the buffer being parsed. This usually results in a non-exploitable crash, but can leak a limited amount of information from memory if it matches JavaScript identifier syntax. This vulnerability affects Firefox < 56.
Is CVE-2017-7813 actively exploited?
Active exploitation of CVE-2017-7813 has not been confirmed. Its EPSS score was 1.6% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2017-7813?
CVE-2017-7813 has a CVSS v3 base score of 8.2 (HIGH severity).
Is CVE-2017-7813 affecting your environment?
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