CVE-2026-113811 RRWO CVE debrief

Who should care

Defenders responsible for Perl applications using Algorithm::UrataniTakeda, particularly those handling text input or potentially exposed to crafted input, should assess and mitigate this vulnerability.

Why it matters

CVE-2026-113811 is significant for defenders of Perl applications using Algorithm::UrataniTakeda, as it allows for potential memory exhaustion through a never-cleared failure shift cache in search. This could lead to denial of service, performance degradation, or system crashes if exploited. Defenders should verify exposure, apply patches, and monitor systems for unusual memory usage patterns.

• Potential memory exhaustion leading to denial of service
• Increased risk of performance degradation or crashes
• Need for verification of exposure and patch application
• Possible impact on system stability and availability

Technical summary

The Algorithm::UrataniTakeda Perl module, versions from 0.1.5 before 0.1.7, is vulnerable to memory exhaustion due to a never-cleared failure shift cache in the search function. An attacker who can submit text with many distinct characters to a long-lived matcher can cause memory growth with each search. This vulnerability can lead to denial of service, performance degradation, or system crashes if exploited. Defenders should prioritize verifying exposure and applying patches for the Algorithm::UrataniTakeda Perl module, particularly in systems handling text input. The CVE record and source item provide details on the vulnerability, and defenders should review these sources to understand the affected scope,

Defensive priority

Defenders should prioritize verifying exposure and applying patches for the Algorithm::UrataniTakeda Perl module, particularly in systems handling text input.

Recommended defensive actions

• Verify if systems using Algorithm::UrataniTakeda are exposed to potential memory exhaustion attacks
• Apply patches or upgrade to version 0.1.7 or later
• Monitor systems for unusual memory usage patterns
• Consider implementing compensating controls for text input handling
• Review and update incident response plans to address potential memory exhaustion attacks
• Conduct regular security audits to identify and address vulnerabilities in Perl applications
• Implement additional logging and monitoring to detect potential memory exhaustion attacks

Evidence notes

The CVE record and source item provide details on the vulnerability in Algorithm::UrataniTakeda versions from 0.1.5 before 0.1.7, which allows memory exhaustion via a never-cleared failure shift cache in search.

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.