---
title: "CVE-2026-111812: Apache Traffic Server - Authentication Bypass"
description: "Apache Traffic Server 8.0.0 through 8.1.11, 9.0.0 through 9.2.15, 10.0.0 through 10.1.4, and 10.2.0 contains an authentication bypass caused by origin_server_auth plugin allowing clients to force signing of attacker-chosen AWS request headers under proxy credentials, letting attackers impersonate the proxy, exploit requires crafted AWS request headers."
url: https://panop.io/threat-heartbeat/CVE-2026-111812/
---

# CVE-2026-111812 Apache Traffic Server - Authentication Bypass

Apache Traffic Server 8.0.0 through 8.1.11, 9.0.0 through 9.2.15, 10.0.0 through 10.1.4, and 10.2.0 contains an authentication bypass caused by origin\_server\_auth plugin allowing clients to force signing of attacker-chosen AWS request headers under proxy credentials, letting attackers impersonate the proxy, exploit requires crafted AWS request headers.

CVSS base score 10.0 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-111812)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Published

21 October 2026

Updated

22 October 2026

Weakness

[CWE-863](https://cwe.mitre.org/data/definitions/863.html)

## Vendor fix

Upgrade to versions 9.2.16, 10.1.5, or 10.2.1.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-111812](https://nvd.nist.gov/vuln/detail/CVE-2026-111812)
- [https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc](https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kc)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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