Text::CSV_XS versions before 1.62 for Perl have a use-after-free when registered callbacks extend the Perl argument stack, which may enable type confusion or memory corruption.
The Parse, print, getline, and getline_all methods invoke registered callbacks (for example after_parse, before_print, or on_error) and cache the Perl argument stack pointer across the call. If a callback extends the argument stack enough to trigger a reallocation, the return value is written through the stale pointer into the freed buffer, and the caller reads the original $self argument as the return value instead.
Calling code that expects parsed data from getline_all receives the Text::CSV_XS object in its place, leading to logic errors or crashes. Text::CSV_XS objects used without any registered callbacks are not affected.
{
"cna_assigner": "CPANSec",
"cwe_ids": [
"CWE-416",
"CWE-825"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/7xxx/CVE-2026-7111.json"
}{
"cpe": "cpe:2.3:a:hmbrand:text\\:\\:csv_xs:*:*:*:*:*:perl:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "1.62"
}
],
"source": [
"CPE_RANGE",
"REFERENCES"
]
}