CVE-2019-15903
CVSS v3
7.5
HIGH
EPSS Score
6.6 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read.
Technical details
- Published
- 2019-09-04
Frequently asked questions
What is CVE-2019-15903?
In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read.
Is CVE-2019-15903 actively exploited?
Active exploitation of CVE-2019-15903 has not been confirmed. Its EPSS score was 6.6% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-15903?
CVE-2019-15903 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2019-15903 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
No credit card required · 500 free checks/month · Free API key
Other 2019 vulnerabilities worth triaging
Ranked by exploit probability (EPSS).