CVE-2024-23644Network attack vector

HTTP message splitting via unvalidated outbound headers

Published Jan 24, 2024 · Updated May 30, 2025

HTTP splitting in Trillium's trillium-http before 0.3.12 and trillium-client before 0.5.4 allows attackers to desynchronize HTTP messages. The HeaderName and HeaderValue types accepted CR, LF, and null bytes infallibly, and outbound client requests and server responses serialized them without validation. Exploitation requires an application to place attacker-controlled input in outbound header names or values; successful CRLF injection can expose other requests or redirect server-side traffic.

CVSS severity6.8
Medium
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

HTTP splitting in Trillium's trillium-http before 0.3.12 and trillium-client before 0.5.4 allows attackers to desynchronize HTTP messages. The HeaderName and HeaderValue types accepted CR, LF, and null bytes infallibly, and outbound client requests and server responses serialized them without validation. Exploitation requires an application to place attacker-controlled input in outbound header names or values; successful CRLF injection can expose other requests or redirect server-side traffic.

The record

CVE
CVE-2024-23644
Published
Jan 24, 2024
Updated
May 30, 2025
Vendor
Trillium
Product
Trillium
Classifications
CWE-436, CWE-113, T1190
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 24, 2024CVE publishedPublication date reported by the CVE source.
  2. May 30, 2025Record 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=< 0.3.12
  2. Affected versionversion=< 0.5.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Trillium · Trilliumversion=< 0.3.12; version=< 0.5.4

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
6.8GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-436Interpretation Conflict
CWE-113Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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