CVE-2026-110754 HMBRAND CVE debrief

Who should care

Defenders responsible for Perl applications using Text::CSV_XS, especially those parsing untrusted CSV data, should assess exposure and prioritize patching to prevent potential memory exhaustion attacks.

Why it matters

CVE-2026-110754 is a memory leak vulnerability in Text::CSV_XS that can lead to memory exhaustion in long-running processes parsing untrusted CSV data. Defenders should prioritize patching to version 1.65 or later.

• Memory exhaustion through repeated malformed input
• Potential denial-of-service through resource depletion

Technical summary

The getline function in Text::CSV_XS versions before 1.65 for Perl leaks the parsed fields of a record that fails to parse, leading to a memory leak. This occurs when the record has a syntax error and getline returns undef without freeing the array or parsed fields. The vulnerability can cause memory exhaustion in long-running processes parsing untrusted CSV data, making it crucial for defenders to prioritize patching or updating to version 1.65 or later of Text::CSV_XS to prevent potential memory exhaustion attacks.

Defensive priority

Defenders should prioritize patching or updating to version 1.65 or later of Text::CSV_XS to prevent potential memory exhaustion attacks.

Recommended defensive actions

• Update to Text::CSV_XS version 1.65 or later
• Restrict input to trusted sources
• Monitor for unusual memory usage in long-running processes
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including a description of the issue and affected versions. However, the corpus does not establish versions, exploitation, impact, or remediation beyond patching to version 1.65 or later.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.