CVE-2006-10003Network attack vector

Memory corruption via off-by-one stack growth check

Published Mar 19, 2026 · Updated Mar 19, 2026

Heap buffer overflow in Todd Rinaldo XML::Parser 2.47 and earlier allows attackers to corrupt memory via deeply nested XML. The startElement routine in Expat/Expat.xs checks the current index instead of the next pre-incremented index, so st_serial_stack is not grown before a four-byte write past its allocation. The hosting process must parse attacker-controlled XML; a successful trigger can crash that process, while public evidence does not demonstrate code execution.

CVSS severity9.8
Critical
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in Todd Rinaldo XML::Parser 2.47 and earlier allows attackers to corrupt memory via deeply nested XML. The startElement routine in Expat/Expat.xs checks the current index instead of the next pre-incremented index, so st_serial_stack is not grown before a four-byte write past its allocation. The hosting process must parse attacker-controlled XML; a successful trigger can crash that process, while public evidence does not demonstrate code execution.

The record

CVE
CVE-2006-10003
Published
Mar 19, 2026
Updated
Mar 19, 2026
Vendor
Todd Rinaldo
Product
XML::Parser
Classifications
CWE-193, CWE-122, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 19, 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 <=2.47

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Todd Rinaldo · XML::Parserversion=0 <=2.47

Published CVSS scores

8.8Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-193Off-by-one Error
CWE-122Heap-based Buffer Overflow
T1203Exploitation for Client Execution

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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