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PatchSiren cyber security CVE debrief

CVE-2026-10879 HMBRAND CVE debrief

A critical vulnerability was discovered in DBI versions before 1.648 for Perl, which can lead to a heap overflow when preparsing SQL statements with more than 9 binders. The preparse method expands SQL placeholder characters to numbered binders of the form :pN, but only allocates three characters per binder in the buffer. Placeholders 10-99 require four characters, 100-999 require five characters, et cetera. This vulnerability has a CVSS score of 9.8 and is classified as CRITICAL.

Vendor
HMBRAND
Product
DBI
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-05
Original CVE updated
2026-06-10
Advisory published
2026-06-05
Advisory updated
2026-06-10

Who should care

Users of Perl's DBI module, especially those who handle SQL statements with multiple binders, should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by the preparse method's insufficient buffer allocation for binders. When the number of binders exceeds 9, the buffer overflow occurs, leading to a heap overflow.

Defensive priority

high

Recommended defensive actions

  • Upgrade to DBI version 1.648 or later.
  • Apply the patch provided by the vendor [ref-4].
  • Refer to the release notes for DBI version 1.648 [ref-5].

Evidence notes

The vulnerability was reported and analyzed by the Perl DBI community and security researchers [ref-6].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-10879 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-10879

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-10879 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-10879

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Mitigation or vendor reference

    Unverified legacy reference

    URL: https://github.com/perl5-dbi/dbi/commit/af79036c07aa9a457971c0f4136e37c85dc20978.patch

    9b29abf9-4ab0-4765-b253-1875cd9b441e - Patch

  • Mitigation or vendor reference

    Unverified legacy reference

    URL: https://metacpan.org/release/HMBRAND/DBI-1.648/changes

    9b29abf9-4ab0-4765-b253-1875cd9b441e - Release Notes

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.