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CVE-2024-35161

Apache Traffic Server: Incomplete check for chunked trailer section allows request smuggling

Apache Traffic Server forwards malformed HTTP chunked trailer section to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4. Users can set a new setting (proxy.config.http.drop_chunked_trailers) not to forward chunked trailer section. Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.

CVSS 3.1 · 9.1 Critical EPSS < 1% KEV · Not listed
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CVE-2023-38522

Apache Traffic Server: Incomplete field name check allows request smuggling

Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4. Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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CVE-2024-50306

Apache Traffic Server: Server process can fail to drop privilege

Unchecked return value can allow Apache Traffic Server to retain privileges on startup. This issue affects Apache Traffic Server: from 9.2.0 through 9.2.5, from 10.0.0 through 10.0.1. Users are recommended to upgrade to version 9.2.6 or 10.0.2, which fixes the issue.

CVSS 3.1 · 9.1 Critical EPSS 1.6% KEV · Not listed
CVE-2024-38479

Apache Traffic Server: Cache key plugin is vulnerable to cache poisoning attack

Improper Input Validation vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.5. Users are recommended to upgrade to version 9.2.6, which fixes the issue, or 10.0.2, which does not have the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
CVE-2022-25763

Improper input validation on HTTP/2 headers

Improper Input Validation vulnerability in HTTP/2 request validation of Apache Traffic Server allows an attacker to create smuggle or cache poison attacks. This issue affects Apache Traffic Server 8.0.0 to 9.1.2.

CVSS 3.1 · 6.8 Medium EPSS 2.1% KEV · Not listed
CVE-2025-49763

Apache Traffic Server: Remote DoS via memory exhaustion in ESI Plugin

ESI plugin does not have the limit for maximum inclusion depth, and that allows excessive memory consumption if malicious instructions are inserted. Users can use a new setting for the plugin (--max-inclusion-depth) to limit it. This issue affects Apache Traffic Server: from 10.0.0 through 10.0.5, from 9.0.0 through 9.2.10. Users are recommended to upgrade to version 9.2.11 or 10.0.6, which fixes the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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CVE-2025-31698

Apache Traffic Server: Client IP address from PROXY protocol is not used for ACL

ACL configured in ip_allow.config or remap.config does not use IP addresses that are provided by PROXY protocol. Users can use a new setting (proxy.config.acl.subjects) to choose which IP addresses to use for the ACL if Apache Traffic Server is configured to accept PROXY protocol.  This issue affects undefined: from 10.0.0 through 10.0.6, from 9.0.0 through 9.2.10. Users are recommended to upgrade to version 9.2.11 or 10.0.6, which fixes the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
CVE-2023-41752

Apache Traffic Server: s3_auth plugin problem with hash calculation

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Traffic Server.This issue affects Apache Traffic Server: from 8.0.0 through 8.1.8, from 9.0.0 through 9.2.2. Users are recommended to upgrade to version 8.1.9 or 9.2.3, which fixes the issue.

CVSS 3.1 · 7.5 High EPSS 1.6% KEV · Not listed
CVE-2023-39456

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.

CVSS 3.1 · 7.5 High EPSS 58.3% KEV · Not listed
CVE-2024-50305

Apache Traffic Server: Valid Host field value can cause crashes

Valid Host header field can cause Apache Traffic Server to crash on some platforms. This issue affects Apache Traffic Server: from 9.2.0 through 9.2.5. Users are recommended to upgrade to version 9.2.6, which fixes the issue, or 10.0.2, which does not have the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
CVE-2024-56196

Apache Traffic Server: ACL is not fully compatible with older versions

Improper Access Control vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 10.0.0 through 10.0.3. Users are recommended to upgrade to version 10.0.4, which fixes the issue.

CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
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CVE-2024-53868

Apache Traffic Server: Malformed chunked message body allows request smuggling

Apache Traffic Server allows request smuggling if chunked messages are malformed.  This issue affects Apache Traffic Server: from 9.2.0 through 9.2.9, from 10.0.0 through 10.0.4. Users are recommended to upgrade to version 9.2.10 or 10.0.5, which fixes the issue.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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CVE-2024-56195

Apache Traffic Server: Intercept plugins are not access controlled

Improper Access Control vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 9.2.0 through 9.2.8, from 10.0.0 through 10.0.3. Users are recommended to upgrade to version 9.2.9 or 10.0.4, which fixes the issue.

CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
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CVE-2024-56202

Apache Traffic Server: Expect header field can unreasonably retain resource

Expected Behavior Violation vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 9.0.0 through 9.2.8, from 10.0.0 through 10.0.3. Users are recommended to upgrade to versions 9.2.9 or 10.0.4 or newer, which fixes the issue.

CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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CVE-2024-38311

Apache Traffic Server: Request smuggling via pipelining after a chunked message body

Improper Input Validation vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.8, from 10.0.0 through 10.0.3. Users are recommended to upgrade to version 9.2.9 or 10.0.4, which fixes the issue.

CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
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CVE-2017-5659

Apache Traffic Server before 6.2.1 generates a coredump when there is a mismatch between content length and chunked encoding.

CVSS 3.0 · 7.5 High EPSS 3.0% KEV · Not listed
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CVE-2015-5206

Unspecified vulnerability in the HTTP/2 experimental feature in Apache Traffic Server before 5.3.x before 5.3.2 has unknown impact and attack vectors, a different vulnerability than CVE-2015-5168.

CVSS 3.0 · 9.8 Critical EPSS 2.4% KEV · Not listed
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CVE-2015-5168

Unspecified vulnerability in the HTTP/2 experimental feature in Apache Traffic Server 5.3.x before 5.3.2 has unknown impact and attack vectors, a different vulnerability than CVE-2015-5206.

CVSS 3.0 · 9.8 Critical EPSS 2.4% KEV · Not listed
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