Is CVE-2026-33267 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-33267 being exploited in the wild.

How severe is CVE-2026-33267?

Critical severity, with a CVSS score of 10, published 29 July 2026.

Which products and versions are affected?

Apache Traffic Server 9.2.0 to 9.2.14, 10.1.0 to 10.1.3.

Is there a fix for CVE-2026-33267?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-33267 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-33267?

Check whether you run Apache Traffic Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-33267: Apache Traffic Server improper input validation

CVE-2026-33267 · Severity: critical · CVSS 10 · Published 2026-07-29

Apache Traffic Server, a high-performance caching proxy used to manage web traffic and speed up content delivery, contains a critical security vulnerability. This flaw allows remote attackers to bypass security checks by sending specially crafted data that the system fails to validate correctly. Exploitation could lead to unauthorized access to sensitive data or the ability to modify web traffic, potentially compromising customer information and the integrity of the network.

Technologies: Apache Traffic Server. Vendors: Apache.

Quick answers

Is CVE-2026-33267 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-33267 being exploited in the wild.
How severe is CVE-2026-33267?: Critical severity, with a CVSS score of 10, published 29 July 2026.
Which products and versions are affected?: Apache Traffic Server 9.2.0 to 9.2.14, 10.1.0 to 10.1.3.
Is there a fix for CVE-2026-33267?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-33267 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-33267?: Check whether you run Apache Traffic Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A critical improper input validation vulnerability (CWE-20) exists in Apache Traffic Server. The flaw allows a remote, unauthenticated attacker to bypass security constraints via the network. According to the CVSS 3.1 vector, the vulnerability has a high impact on confidentiality and integrity and involves a scope change, suggesting it may affect backend systems or other components beyond the proxy itself. The issue affects versions 9.2.0 through 9.2.14 and 10.1.0 through 10.1.3. Users are advised to upgrade to versions 9.2.15 or 10.1.4 to mitigate the risk.

Affected products

Apache Traffic Server 9.2.0 to 9.2.14, 10.1.0 to 10.1.3

Timeline

2026-07-29: disclosed
2026-07-29: advisory

References

https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d

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