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CVE-2026-7111 HMBRAND CVE debrief

CVE-2026-7111 is a high-severity vulnerability in Text::CSV_XS, a Perl module for parsing and generating CSV data. The vulnerability allows for use-after-free, which may enable type confusion or memory corruption. This occurs when registered callbacks extend the Perl argument stack, causing a reallocation that invalidates the cached stack pointer. As a result, the return value is written to the freed buffer, leading to potential logic errors or crashes. The vulnerability affects Text::CSV_XS versions before 1.62 for Perl. Calling code that expects parsed data from getline_all may receive the Text::CSV_XS object instead, leading to logic errors or crashes. Text::CSV_XS objects used without any registered callbacks are not affected.

Vendor
HMBRAND
Product
Text::CSV_XS
CVSS
HIGH 8.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-29
Original CVE updated
2026-06-25
Advisory published
2026-04-29
Advisory updated
2026-06-25

Who should care

Developers and administrators using Text::CSV_XS in their Perl applications should be aware of this vulnerability. The vulnerability's high severity (CVSS score of 8.4) indicates that it could have a significant impact on the security of affected systems. Users of Debian and other Linux distributions that include Text::CSV_XS in their packages should check for updates or patches from their distribution vendors.

Technical summary

The vulnerability in Text::CSV_XS arises from a use-after-free condition. When registered callbacks extend the Perl argument stack, it can trigger a reallocation. If this reallocation occurs, the cached pointer to the Perl argument stack becomes invalid. As a result, the return value from the callback is written to the freed memory location. This can lead to type confusion or memory corruption. The Parse, print, getline, and getline_all methods are affected as they invoke registered callbacks and cache the Perl argument stack pointer. If a callback extends the argument stack enough to trigger reallocation, the return value is written through the stale pointer into the freed buffer.

Defensive priority

This vulnerability should be prioritized for remediation due to its high CVSS score of 8.4, indicating a high severity. The potential for type confusion or memory corruption makes it critical to address.

Recommended defensive actions

  • Update Text::CSV_XS to version 1.62 or later.
  • Review and patch affected Perl applications that use Text::CSV_XS.
  • Implement compensating controls to monitor for suspicious activity in Perl applications.
  • Check with distribution vendors for updated packages.
  • Monitor systems for potential logic errors or crashes related to Text::CSV_XS.

Evidence notes

The CVE-2026-7111 vulnerability was publicly disclosed on April 29, 2026, and last modified on June 25, 2026. The vulnerability affects Text::CSV_XS versions before 1.62. The CVSS vector is CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating a high severity. The weakness is classified under CWE-416 and CWE-825.

Official resources

This article is AI-assisted and based on the supplied source corpus.