CVE-2023-6299Public exploitNetwork attack vector

Service interruption via oversized PDF page structures

Published Nov 26, 2023 · Updated Aug 2, 2024

Memory exhaustion in Apryse iText 8.0.1 allows remote attackers to interrupt an embedding service through a crafted PDF. PdfDocument reference-table processing allocates excessive memory for a declared huge page count and empty data structures. The embedding application must process the file; exhaustion can terminate or stall that application, without reported confidentiality or integrity impact.

CVSS severity4.3
Medium
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory exhaustion in Apryse iText 8.0.1 allows remote attackers to interrupt an embedding service through a crafted PDF. PdfDocument reference-table processing allocates excessive memory for a declared huge page count and empty data structures. The embedding application must process the file; exhaustion can terminate or stall that application, without reported confidentiality or integrity impact.

The record

CVE
CVE-2023-6299
Published
Nov 26, 2023
Updated
Aug 2, 2024
Vendor
Apryse
Product
iText
Classifications
CWE-401, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 26, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apryse · iTextversion=8.0.1

Published CVSS scores

4.3VulDB CNACVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
4.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
5.0VulDB CNAAV:N/AC:L/Au:N/C:N/I:N/A:P

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-401Memory Leak
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

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Technologies

Your stack

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Your stack

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