CVE-2026-88816Public exploitHinoki check available

Process crash via unstringified numeric hash-key attribute

Published Sep 28, 2026 · Updated Sep 28, 2026

Type confusion in Perl DBI before 1.654 allows context-dependent attackers to crash a Perl process through a numeric FetchHashKeyName value. In DBI.xs, fetchrow_hashref reads that value with SvPVX without first converting it to a string, then passes the invalid pointer to string-length and hash-lookup operations. Exploitation requires a consuming application to place a numeric value in the writable handle attribute and perform a hash-reference fetch; the demonstrated consequence is a process crash.

CVSS severity3.3
Low
EPSS probability0.62%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Type confusion in Perl DBI before 1.654 allows context-dependent attackers to crash a Perl process through a numeric FetchHashKeyName value. In DBI.xs, fetchrow_hashref reads that value with SvPVX without first converting it to a string, then passes the invalid pointer to string-length and hash-lookup operations. Exploitation requires a consuming application to place a numeric value in the writable handle attribute and perform a hash-reference fetch; the demonstrated consequence is a process crash.

The record

CVE
CVE-2026-88816
Published
Sep 28, 2026
Updated
Sep 28, 2026
Vendor
Perl DBI
Product
DBI
Classifications
CWE-843, CWE-125, T1499
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 28, 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.

  1. Affected versionversion=0 <1.654

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Perl DBI · DBIversion=0 <1.654

Published CVSS scores

3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-843Access of Resource Using Incompatible Type ('Type Confusion')
CWE-125Out-of-bounds Read
T1499Endpoint Denial of Service

Public exploit references

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Technologies

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