CVE-2024-53868 | Apache Traffic Server: Malformed chunked message body allows request smuggling

Apache Traffic Server allows request smuggling if chunked messages are malformed.  This issue affects Apache Traffic Server: from 9.2.0 through 9.2.9, from 10.0.0 through 10.0.4. Users are recommended to upgrade to version 9.2.10 or 10.0.5, which fixes the issue.

Published: 2025-04-03 Last update: 2025-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-53868 is rated Moderate Risk (48.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.29%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-53868

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-18 0.24% 0.29% +0.05%
2 2026-05-12 0.31% 0.24% -0.07%
3 2026-05-11 — 0.31% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-53868

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-53868

OS Trackers for CVE-2024-53868

vendor priority summary link
alpine — CVE-2024-53868: 1 source package rows (trafficserver9); 3 state rows across 3 repos (3.21-community, 3.22-community, edge-community); fixed 3, open 0. https://security.alpinelinux.org/vuln/CVE-2024-53868
debian not yet assigned CVE-2024-53868 not yet assigned priority: Debian including 1 source packages (trafficserver), 3 status rows across 3 suites (bookworm, bullseye, sid): open 2, resolved 1. https://security-tracker.debian.org/tracker/CVE-2024-53868
ubuntu medium CVE-2024-53868 medium priority: Ubuntu including 1 source packages (trafficserver), 9 status rows across 9 suites (bionic, focal, jammy, noble, oracular, plucky, questing, upstream, xenial): needed 4, ignored 2, needs-triage 2, released 1. https://ubuntu.com/security/CVE-2024-53868

Affected software / configurations for CVE-2024-53868

Vendor Product Version Raw CPE
apache traffic_server >= 9.0.0, < 9.2.10 cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*
apache traffic_server >= 10.0.0, < 10.0.5 cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*

References for CVE-2024-53868

cvelogic Threat Intelligence