CVE-2024-22641Public exploitNetwork attack vector

PDF generation interruption via SVG regex backtracking

Published May 28, 2024 · Updated Nov 3, 2025

Regular expression denial of service in TCPDF 6.6.5 and earlier allows remote attackers to interrupt PDF generation with an untrusted SVG file. The SVG parser applies a backtracking-prone regular expression to a crafted circle clip attribute, reaching PHP's regex backtrack limit. An application must pass attacker-controlled SVG content to the library; triggering interrupts the PDF-rendering operation without reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability1.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Regular expression denial of service in TCPDF 6.6.5 and earlier allows remote attackers to interrupt PDF generation with an untrusted SVG file. The SVG parser applies a backtracking-prone regular expression to a crafted circle clip attribute, reaching PHP's regex backtrack limit. An application must pass attacker-controlled SVG content to the library; triggering interrupts the PDF-rendering operation without reported data disclosure or modification.

The record

CVE
CVE-2024-22641
Published
May 28, 2024
Updated
Nov 3, 2025
Vendor
Tecnick.com LTD
Product
TCPDF
Classifications
CWE-434, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 28, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <6.6.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Tecnick.com LTD · TCPDFversion=0 <6.6.5

Published CVSS scores

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-434Unrestricted Upload of File with Dangerous Type
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo