Heap overwrite via numeric placeholder counter overflow
Published Aug 15, 2026 · Updated Aug 15, 2026
Heap out-of-bounds write in DBI before 1.652 allows remote attackers to corrupt process memory through a crafted SQL statement. The preparse numeric-placeholder branch assigns atoi output to the binder counter without range checking, so later question marks expand beyond its seven-byte budget. Exploitation requires an application to preparse attacker-controlled SQL into numbered placeholders and can disclose memory or crash the hosting process.
Summary
What happened
Heap out-of-bounds write in DBI before 1.652 allows remote attackers to corrupt process memory through a crafted SQL statement. The preparse numeric-placeholder branch assigns atoi output to the binder counter without range checking, so later question marks expand beyond its seven-byte budget. Exploitation requires an application to preparse attacker-controlled SQL into numbered placeholders and can disclose memory or crash the hosting process.
The record
- CVE
- CVE-2026-73194
- Published
- Aug 15, 2026
- Updated
- Aug 15, 2026
- Vendor
- Perl DBI
- Product
- DBI
- Classifications
- CWE-1284, CWE-787
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 15, 2026CVE publishedPublication date reported by the CVE source.
- Aug 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <1.652
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Numeric-placeholder heap-overflow reproducerproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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