DbiApplication · Perl
CVE-2026-14740
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedDBI 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.
In the news
Third-party coverageSurfaced from public web coverage — external links open in a new tab.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThe DBI Perl module's preparse function, which normalizes SQL by removing comments, reads one byte out-of-bounds when deleting an initial SQL comment line. This causes faults on memory-hardened builds and nondeterministic newline retention on normal builds.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
DbiApplication
< 1.650CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check if DBI module is installedRun `perldoc DBI` or try `perl -MDBI -e 'print DBI->VERSION'` to see if the module loadsAffected if DBI module is not installed or cannot be loaded
-
Identify installed DBI versionRun `perl -MDBI -e 'print DBI->VERSION'` or check the DBI version via CPAN/dpkg/rpm depending on installation methodAffected if The returned version number is less than 1.650
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Verify DBI usage with SQL containing commentsReview application code or configuration to determine if DBI's preparse functionality is invoked, typically when passing SQL statements with comment lines to DBI methods like prepare() or do()Affected if SQL statements containing comment lines are being processed through DBI methods like prepare(), do(), or dbh->prepare()
A system is affected if DBI version is below 1.650 AND the preparse function is invoked by passing SQL statements that contain initial comment lines to DBI methods.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped1.650
Upgrade DBI to version 1.650 or later to resolve the out-of-bounds read in the preparse function.
DBI 1.650
- Upgrade the Perl DBI module to version 1.650 or later
- If using CPAN: Run 'cpan DBI' or 'cpanm DBI' to update to the latest version
- If using system package manager (e.g., apt, yum, brew): Update the perl-DBI or libdbi-perl package to version 1.650 or later
- Verify the installed version by running: perl -MDBI -e 'print $DBI::VERSION'
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Dbi
Scoped from the published advisory
- Consultation2.0 h
- Implementation1.0 h
- Testing4.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-14740 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-14740 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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