What’s Vulnerable › Vulnerabilities

CVE-2021-44040: HTTP request line fuzzing attacks

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-03-23 · updated 2026-06-17
• Weakness: CWE-20

Description

Improper Input Validation vulnerability in request line parsing of Apache Traffic Server allows an attacker to send invalid requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.3 and 9.0.0 to 9.1.1.

Affected products

• Apache Software Foundation Apache Traffic Server: from 8.0.0 through 8.1.3; from 9.0.0 through 9.1.1
• Debian Linux: 10.0, 11.0

References

• https://lists.apache.org/thread/zblwzcfs9ryhwjr89wz4osw55pxm6dx6
• https://www.debian.org/security/2022/dsa-5153
• https://lists.apache.org/thread/zblwzcfs9ryhwjr89wz4osw55pxm6dx6
• https://www.debian.org/security/2022/dsa-5153

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