Vulnerability Details CVE-2026-92842
The convert.base64-encode, convert.quoted-printable-encode and convert.quoted-printable-decode stream filters accept a line-break-chars option whose length is tracked separately from the string itself. The filter constructors duplicate the value with pestrdup(), which stops at the first NUL byte, while keeping the original length. When the filter later emits a line break it copies the recorded length out of the truncated allocation, reading past its end and placing adjacent heap bytes into the filter output.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 13.0%
CVSS Severity
CVSS v3 Score 5.9