CVE-2026-13221
A remote, anonymous attacker can exploit multiple vulnerabilities in Perl to carry out a denial of service attack or disclose confidential information.
CSIRTS triage
- What
- Multiple vulnerabilities in Perl can be exploited by remote attackers to cause denial of service or disclose confidential information.
- Who is affected
- Deployments of Perl are affected by these vulnerabilities.
- Urgency
- Remediation is important due to the medium severity of potential impacts.
- Action
- Update to the latest version of Perl.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.
Advisory coverage (3)
- medium[NEW] [medium] Perl: Multiple vulnerabilitiescert-bund · 2026-07-29
- mediumCVE-2026-13221: Perl versions through 5.43.9 produce silently incorrect regular expression matches when an alt…msrc · 2026-07-14
- criticalCVE-2026-13221: Perl versions through 5.43.9 produce silently incorrect regular expression matches when an alt…nvd · 2026-07-13
External references
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[](https://www.csirts.com/cve/CVE-2026-13221)