Improper Input Validation in Apache Traffic Server
CVE-2026-33267

7.7HIGH

Key Information:

Vendor

Apache
Status
Apache Traffic Server
Vendor
CVE Published:
29 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-33267?

An improper input validation vulnerability exists in Apache Traffic Server, affecting versions 9.2.0 through 9.2.14 and 10.1.0 through 10.1.3. This flaw allows attackers to send maliciously crafted inputs that the server may not handle properly, potentially leading to unexpected behavior. Upgrading to version 9.2.15 or 10.1.4 is recommended to mitigate this issue.

Affected Version(s)

Apache Traffic Server 9.2.0 <= 9.2.14

Apache Traffic Server 10.1.0 <= 10.1.3

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-33267-PoC
Created by Boreas37

References

https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnoky...
vendor-advisory

CVSS V4

Score:
7.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Charlie Campbell
Apache Community
.