CVE-2024-45797Public exploitNetwork attack vector

Extreme slowdown via unbounded quadratic header processing

Published Oct 16, 2024 · Updated Nov 3, 2025

Denial of service in Open Information Security Foundation LibHTP before 0.5.49 allows remote attackers to cause extreme slowdowns. The request and response header parsers accept unbounded header counts and repeatedly search the growing table with htp_table_get, creating quadratic work. Traffic only needs to reach a consuming application's parser; no authentication or user interaction is required.

CVSS severity7.5
High
EPSS probability0.73%
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

Denial of service in Open Information Security Foundation LibHTP before 0.5.49 allows remote attackers to cause extreme slowdowns. The request and response header parsers accept unbounded header counts and repeatedly search the growing table with htp_table_get, creating quadratic work. Traffic only needs to reach a consuming application's parser; no authentication or user interaction is required.

The record

CVE
CVE-2024-45797
Published
Oct 16, 2024
Updated
Nov 3, 2025
Vendor
Open Information Security Foundation
Product
LibHTP
Classifications
CWE-770, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 16, 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 <0.5.49
  2. Affected versionversion=< 0.5.49

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Information Security Foundation · LibHTPversion=0 <0.5.49; version=< 0.5.49

Published CVSS scores

7.5GitHub, Inc.CVSS: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-770Allocation of Resources Without Limits or Throttling
T1499.003Application Exhaustion Flood

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