CVE-2026-9698Network attack vector

Code execution via unbounded error-prefix formatting

Published Jun 9, 2026 · Updated Jun 9, 2026

Stack buffer overflow in DBI before 1.648 allows remote attackers to execute code through attacker-influenced application errors. DBI.xs dispatch error handling uses unbounded sprintf to format a method prefix into a 200-byte stack buffer instead of allocating a size-matched Perl scalar. Reachability requires an application to return attacker-influenced errors with RaiseError, PrintError, or HandleError enabled; successful corruption can crash the process or execute code.

CVSS severity9.8
Critical
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in DBI before 1.648 allows remote attackers to execute code through attacker-influenced application errors. DBI.xs dispatch error handling uses unbounded sprintf to format a method prefix into a 200-byte stack buffer instead of allocating a size-matched Perl scalar. Reachability requires an application to return attacker-influenced errors with RaiseError, PrintError, or HandleError enabled; successful corruption can crash the process or execute code.

The record

CVE
CVE-2026-9698
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
DBI team
Product
DBI
Classifications
CWE-120, CWE-787
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 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 <1.648

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DBI team · DBIversion=0 <1.648

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.2redhat-SADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-787Out-of-bounds Write

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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