What’s Vulnerable › Vulnerabilities

CVE-2017-20230: Storable versions before 3.05 for Perl has a stack overflow

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-21 · updated 2026-06-17
• Weakness: CWE-121

Description

Storable versions before 3.05 for Perl has a stack overflow. The retrieve_hook function stored the length of the class name into a signed integer but in read operations treated the length as unsigned. This allowed an attacker to craft data that could trigger the overflow.

Affected products

• HAARG Storable: before 3.05 — fixed in 3.05

How to fix

Upgrade to a fixed version: HAARG Storable 3.05. Check the vendor advisory for mitigations.

References

• https://github.com/Perl/perl5/commit/a258c17c6937f79529c8319a829310e09cdbd216.patch
• https://github.com/Perl/perl5/issues/15831
• https://metacpan.org/release/RURBAN/Storable-3.05/changes
• https://www.nntp.perl.org/group/perl.perl5.porters/2017/01/msg242533.html
• https://www.nntp.perl.org/group/perl.perl5.porters/2017/01/msg242703.html
• http://www.openwall.com/lists/oss-security/2026/04/21/5

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