CVE-2024-35161

Apache Traffic Server: Incomplete check for chunked trailer section allows request smuggling

HIGH
7.5
CVSS Score
Published: July 26, 2024 at 09:10 AM UTC
Updated: June 17, 2026 at 07:34 AM UTC
1 product affected across 1 vendorTraffic Server

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Severity
HIGH7.5
Exploit prediction
EPSS 1.0%
SSVC
No known exploit

Description

Apache Traffic Server forwards malformed HTTP chunked trailer section to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4. Users can set a new setting (proxy.config.http.drop_chunked_trailers) not to forward chunked trailer section. Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

8.0.0 ≤ v ≤ 8.1.108.0.0 ≤ v < 8.1.119.0.0 ≤ v ≤ 9.2.49.0.0 ≤ v < 9.2.58.0.09.0.0
Affected range stops below 8.1.11, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.2.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-444

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