CVE-2026-14740
CVE-2026-14740 is a critical-severity vulnerability in Perl Dbi with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.
Key facts
- Severity: Critical (CVSS 3.x base score 9.1)
- EPSS exploit prediction: 0% (32nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-125
- Affected product: Perl Dbi
- Published:
- Last modified:
Description
DBI versions before 1.650 for Perl read one byte out-of-bounds in preparse when deleting an initial SQL comment. The preparse method normalises SQL and removes comments. When the SQL starts with a comment line, the deletion of that line during normalisation led to an out-of-bounds read by one byte. The result is a fault on memory-hardened builds and nondeterministic newline retention on normal builds.
Frequently asked questions
- What is CVE-2026-14740?
- DBI versions before 1.650 for Perl read one byte out-of-bounds in preparse when deleting an initial SQL comment. The preparse method normalises SQL and removes comments. When the SQL starts with a comment line, the deletion of that line during normalisation led to an out-of-bounds read by one byte. The result is a fault on memory-hardened builds and nondeterministic newline retention on normal builds.
- How severe is CVE-2026-14740?
- CVE-2026-14740 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability high.
- Is CVE-2026-14740 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-14740?
- CVE-2026-14740 affects Perl Dbi. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-14740?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2026-14740 published?
- CVE-2026-14740 was published on 2026-07-07 and last updated on 2026-07-10.
References
- https://github.com/perl5-dbi/dbi/commit/fc16f9e8b3dd5c65caf1867781ab2bfe2fadcc01.patch
- https://github.com/perl5-dbi/dbi/security/advisories/GHSA-35f4-f8m9-w8xg
- https://metacpan.org/release/HMBRAND/DBI-1.650/changes
- http://www.openwall.com/lists/oss-security/2026/07/07/17
Affected products (1)
- cpe:2.3:a:perl:dbi:*:*:*:*:*:*:*:*
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