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CVE-2023-39456

Apache Traffic Server: Malformed http/2 frames can cause an abort

7.5 HighFix available

Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP/2 frames.This issue affects Apache Traffic Server: from 9.0.0 through 9.2.2.

Users are recommended to upgrade to version 9.2.3, which fixes the issue.

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
None
Integrity
None
Availability
High

Exploit likelihood

58.3%Up 58.2 points since Oct 17, 2023
90%50%10%1%

What each source reports

NVD Score used 7.5

Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP/2 frames.This issue affects Apache Traffic Server: from 9.0.0 through 9.2.2.

Users are recommended to upgrade to version 9.2.3, which fixes the issue.

Record
CVE-2023-39456
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-20
Updated
2026-11-02
CVE List 7.5

Apache Traffic Server: Malformed http/2 frames can cause an abort

Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP/2 frames.This issue affects Apache Traffic Server: from 9.0.0 through 9.2.2.

Users are recommended to upgrade to version 9.2.3, which fixes the issue.

Record
CVE-2023-39456
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-20
Updated
2026-11-02
EUVDEUVD-2023-43179 7.5

Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP/2 frames.This issue affects Apache Traffic Server: from 9.0.0 through 9.2.2.

Users are recommended to upgrade to version 9.2.3, which fixes the issue.

Record
EUVD-2023-43179
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-fr7h-j3xj-fvvv 7.5

Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP/2 frames...

Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP/2 frames.This issue affects Apache Traffic Server: from 9.0.0 through 9.2.2.

Users are recommended to upgrade to version 9.2.3, which fixes the issue.

Record
GHSA-fr7h-j3xj-fvvv
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-20
Updated
2026-11-02
OSVALPINE-CVE-2023-39456 7.5

Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP/2 frames.This issue affects Apache Traffic Server: from 9.0.0 through 9.2.2.

Users are recommended to upgrade to version 9.2.3, which fixes the issue.

Record
ALPINE-CVE-2023-39456
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
OSV 7.5

Apache Traffic Server: Malformed http/2 frames can cause an abort

Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP/2 frames.This issue affects Apache Traffic Server: from 9.0.0 through 9.2.2.

Users are recommended to upgrade to version 9.2.3, which fixes the issue.

Record
CVE-2023-39456
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-20
Updated
2026-11-02
OSVDEBIAN-CVE-2023-39456 7.5

Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP/2 frames.This issue affects Apache Traffic Server: from 9.0.0 through 9.2.2. Users are recommended to upgrade to version 9.2.3, which fixes the issue.

Record
DEBIAN-CVE-2023-39456
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVOESA-2025-1659 7.5

trafficserver security update

Apache Traffic Server is an OpenSource HTTP / HTTPS / HTTP/2 / QUIC reverse, forward and transparent proxy and cache.

Security Fix(es):

Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP/2 frames.This issue affects Apache Traffic Server: from 9.0.0 through 9.2.2.

Users are recommended to upgrade to version 9.2.3, which fixes the issue.(CVE-2023-39456)

Record
OESA-2025-1659
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2023-39456 7.5

Improper Input Validation vulnerability in Apache Traffic Server with malformed HTTP/2 frames.This issue affects Apache Traffic Server: from 9.0.0 through 9.2.2. Users are recommended to upgrade to version 9.2.3, which fixes the issue.

Record
UBUNTU-CVE-2023-39456
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
trafficserver9
Alpine:v3.21
 before 9.2.3-r0
9.2.3-r0
trafficserver9
Alpine:v3.22
 before 9.2.3-r0
9.2.3-r0
trafficserver9
Alpine:v3.23
 before 9.2.3-r0
9.2.3-r0
trafficserver9
Alpine:v3.24
 before 9.2.3-r0
9.2.3-r0
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
openEuler:20.03-LTS-SP4
 before 9.1.4-3.oe2003sp4
9.1.4-3.oe2003sp4
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
RecordedChangedSources
affected, aliases, referencesOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2023-39456 is a high vulnerability (CVSS 7.5) in Apache Traffic Server, published October 17, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 58.3%, the 99th percentile. Fixed in trafficserver9 9.2.3-r0.

References

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