CVE-2022-34035Public exploitNetwork attack vector

Conversion crash via empty-node buffer under-read

Published Jul 18, 2022 · Updated Aug 3, 2024

Heap buffer overflow in HTMLDoc 1.9.12 and earlier allows attackers to crash document conversion by supplying a crafted HTML file. During HTML export, write_node subtracts one from the length of an empty text node and dereferences the resulting address before the allocated buffer. The HTML input must reach an HTMLDoc conversion process; the demonstrated consequence is an AddressSanitizer abort, and Debian reports no wider security impact.

CVSS severity7.5
High
EPSS probability1.65%
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 HTMLDoc 1.9.12 and earlier allows attackers to crash document conversion by supplying a crafted HTML file. During HTML export, write_node subtracts one from the length of an empty text node and dereferences the resulting address before the allocated buffer. The HTML input must reach an HTMLDoc conversion process; the demonstrated consequence is an AddressSanitizer abort, and Debian reports no wider security impact.

The record

CVE
CVE-2022-34035
Published
Jul 18, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 18, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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