Plateforme
perl
Composant
unqlite
Corrigé dans
0.07
CVE-2026-3257 identifies a heap-based overflow vulnerability affecting the UnQLite Perl module. This vulnerability arises from the module's use of an outdated version of the underlying UnQLite library, dating back to 2014. Successful exploitation could lead to denial-of-service or, potentially, code execution. The vulnerability affects versions 0.06 and earlier of the UnQLite Perl module, and a fix is available in version 0.07.
The heap-based overflow vulnerability in UnQLite Perl allows an attacker to potentially overwrite memory regions, leading to a denial-of-service condition by crashing the Perl interpreter. More critically, depending on the memory layout and the attacker's ability to control the overflow, it could be leveraged to achieve arbitrary code execution. This would allow an attacker to gain control of the system running the vulnerable Perl script. While specific exploitation details remain limited, the potential for remote code execution makes this a significant security concern, particularly in environments where the Perl module is exposed to untrusted input.
CVE-2026-3257 was publicly disclosed on 2026-03-05. Currently, there are no publicly available proof-of-concept exploits. The vulnerability's age (based on the library version) suggests it may have been known for some time, but the lack of public exploits indicates a lower probability of immediate exploitation. It has not been added to the CISA KEV catalog.
Systems running Perl scripts that utilize the UnQLite module, particularly those handling untrusted input, are at risk. Shared hosting environments where multiple users may be running Perl scripts are also a concern, as a vulnerability in one user's script could potentially impact others.
• perl / module: Use cpan list to identify installed versions of UnQLite. Check for versions prior to 0.07.
cpan -l UnQLite• perl / module: Examine Perl scripts for imports from the UnQLite module. Review code for any user-controlled input passed to UnQLite functions. • generic / system: Monitor system logs for Perl interpreter crashes or segmentation faults, particularly when the UnQLite module is in use.
disclosure
Statut de l'Exploit
EPSS
0.05% (percentile 17%)
The primary mitigation for CVE-2026-3257 is to upgrade the UnQLite Perl module to version 0.07 or later, which incorporates a patched version of the UnQLite library. If upgrading is not immediately feasible due to compatibility issues or system downtime constraints, consider isolating the vulnerable module and restricting its access to untrusted data. While a direct WAF rule is unlikely to be effective, input validation on any data passed to the UnQLite module can help reduce the attack surface. Monitor system logs for unusual crashes or memory-related errors that could indicate exploitation attempts.
Actualice el módulo UnQLite de Perl a la versión 0.07 o posterior. Esto reemplazará la biblioteca UnQLite vulnerable con una versión corregida.
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CVE-2026-3257 is a heap-based overflow vulnerability in the UnQLite Perl module, stemming from an outdated embedded library. It affects versions 0.06 and earlier, potentially leading to denial-of-service or code execution.
You are affected if you are using the UnQLite Perl module version 0.06 or earlier. Check your installed version using cpan -l UnQLite.
Upgrade the UnQLite Perl module to version 0.07 or later using cpan UnQLite.
Currently, there are no publicly known exploits for CVE-2026-3257, but the potential for code execution warrants attention.
Refer to the Perl module documentation and CPAN for updates and advisories related to CVE-2026-3257.
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