CVE-2023-33934

Apache Traffic Server: Differential fuzzing for HTTP request parsing discrepancies

9.1 CriticalFix available

Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: through 9.2.1.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: None

Exploit likelihood

1.56%Up 1.5 points since Aug 9, 2023

What each source reports

NVD Score used 9.1

Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: through 9.2.1.

Record: CVE-2023-33934
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-444
Updated: 2026-11-02

CVE List 9.1

Apache Traffic Server: Differential fuzzing for HTTP request parsing discrepancies

Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: through 9.2.1.

Record: CVE-2023-33934
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-444
Updated: 2026-11-02

EUVDEUVD-2023-38084 9.1

Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: through 9.2.1.

Record: EUVD-2023-38084
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-jcg7-j3jq-wp4r 9.1

Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server.This...

Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: through 9.2.1.

Record: GHSA-jcg7-j3jq-wp4r
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-20, CWE-444
Updated: 2026-11-02

OSV 9.1

Apache Traffic Server: Differential fuzzing for HTTP request parsing discrepancies

Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: through 9.2.1.

Record: CVE-2023-33934
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-444
Updated: 2026-11-02

OSVDEBIAN-CVE-2023-33934 9.1

Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: through 9.2.1.

Record: DEBIAN-CVE-2023-33934
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-33934 9.1

Improper Input Validation vulnerability in Apache Software Foundation Apache Traffic Server.This issue affects Apache Traffic Server: through 9.2.1.

Record: UBUNTU-CVE-2023-33934
CVSS 3.1: 9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`trafficserver` Debian:12	before 9.2.3+ds-1+deb12u1, plus listed versions 9.2.0+ds-29.2.0+ds-2+deb12u19.2.1+ds-19.2.2+ds-19.2.3+ds-1	9.2.3+ds-1+deb12u1
`trafficserver` Debian:10 From an advisory covering 2 CVEs	before 8.1.7-0+deb10u2, plus listed versions 8.0.2+ds-18.0.2+ds-1+deb10u18.0.2+ds-1+deb10u28.0.2+ds-1+deb10u38.0.2+ds-1+deb10u4 Show 22 moreShow less 8.0.2+ds-1+deb10u58.0.2+ds-1+deb10u68.0.2+ds-1+deb10u78.0.3+ds-18.0.3+ds-28.0.3+ds-38.0.3+ds-48.0.5+ds-18.0.5+ds-28.0.5+ds-38.0.6+ds-18.0.7+ds-18.0.8+ds-18.0.8+ds-28.1.0+ds-18.1.0+ds-28.1.1+ds-18.1.1+ds-1.18.1.5+ds-1~deb11u18.1.6+ds-1~deb10u18.1.6+ds-1~deb11u18.1.7-0+deb10u1	8.1.7-0+deb10u2
`trafficserver` Debian:11 From an advisory covering 4 CVEs	before 8.1.9+ds-1~deb11u1, plus listed versions 8.1.1+ds-1.18.1.1+ds-1.1+deb11u18.1.5+ds-1~deb11u18.1.6+ds-1~deb10u18.1.6+ds-1~deb11u18.1.7+ds-1~deb11u1	8.1.9+ds-1~deb11u1
`trafficserver` Debian:12 From an advisory covering 4 CVEs	before 9.2.3+ds-1+deb12u1, plus listed versions 9.2.0+ds-29.2.0+ds-2+deb12u19.2.1+ds-19.2.2+ds-19.2.3+ds-1	9.2.3+ds-1+deb12u1
`trafficserver` Ubuntu:16.04:LTS	All versions, plus listed versions 5.3.0-2ubuntu15.3.0-2ubuntu2	None known
`trafficserver` Ubuntu:18.04:LTS	All versions, plus listed versions 7.0.0-57.1.2+ds-27.1.2+ds-2build17.1.2+ds-3	None known
`trafficserver` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 8.0.5+ds-18.0.5+ds-28.0.5+ds-2build18.0.5+ds-2ubuntu18.0.5+ds-38.0.5+ds-3ubuntu0.1~esm1	None known
`trafficserver` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 8.1.1+ds-1.19.1.1+ds-2build19.1.1+ds-2ubuntu0.1~esm19.1.1+ds-2ubuntu0.19.1.1+ds-2ubuntu0.1+esm1	None known

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-33934 is a critical vulnerability (CVSS 9.1) in Apache Traffic Server, published August 9, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.56%, the 75th percentile. Fixed in trafficserver 9.2.3+ds-1+deb12u1.

References

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