FPDI allows Memory Exhaustion (OOM) in PDF Parser which leads to Denial of Service

Description

Impact

This is a significant Denial of Service (DoS) vulnerability. Any application that uses FPDI to process
user-supplied PDF files is at risk. An attacker can upload a small, malicious PDF file that will cause
the server-side script to crash due to memory exhaustion. Repeated attacks can lead to sustained
service unavailability.

Patches

Fixed as of version 2.6.4

Workarounds

No.

Basic information

Type
reviewed
Severity
medium
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2025-08-05 15:23:54 UTC
Updated
2025-08-06 14:31:51 UTC
GitHub reviewed
2025-08-05 15:23:54 UTC
NVD published
2025-08-05

EPSS Score

Score Percentile
0.13% 32.95%

CVSS Scores

Base score Version Severity Vector
6.0 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:P)
Additional preconditions must be present for exploitation.
Privileges required (PR:L)
Low privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:N)
No confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:N)
No integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:H)
High availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N)
No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N)
No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.

Identifiers

CWEs

CWE id Name
CWE-770 Allocation of Resources Without Limits or Throttling

Credits

  • N0zoM1z0 (reporter)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
composer setasign/fpdi < 2.6.4 2.6.4

References

cvelogic Threat Intelligence