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Apache Traffic ServerApache Traffic Server: PROXY protocol parsing has port truncation and a stack overflow

Risk 43
Severity
8.2
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Apache Traffic Server mishandles PROXY protocol input, truncating ports and overflowing the stack.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58158

Apache Traffic ServerApache Traffic Server: Listener and ACL handling allow access-control bypass

Risk 54
Severity
7
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

Apache Traffic Server can bypass IP access controls on UDS listeners and through ACL matching errors.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58159

Apache Traffic ServerApache Traffic Server: Certifier plugin trusts client SNI when generating certificates

Risk 82
Severity
8.4
AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H

The Apache Traffic Server certifier plugin generates certificates based on attacker-controlled client SNI.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58162

Apache Traffic ServerApache Traffic Server: Cache deserialization and lifetime errors can corrupt state or crash the server

Risk 66
Severity
8.3
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Apache Traffic Server mishandles on-disk cache fields and object lifetimes, corrupting state or crashing.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58163

Apache Traffic ServerApache Traffic Server: Remap configuration lifetime and TOCTOU errors cause use-after-free

Risk 60
Severity
8.3
Use After Free
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Apache Traffic Server has use-after-free and time-of-check/time-of-use errors in remap configuration handling.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58164

Apache Traffic ServerApache Traffic Server: Buffer overflow via Host field that has a long string value

Risk 43
Severity
8.2
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Apache Traffic Server copies the client Host header into a fixed-size stack buffer without a bound during redirect handling, so an over-long Host header overflows the stack when redirect following is enabled.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-33930

Apache Apache Traffic ServerApache Traffic Server: Malformed chunked message body allows request smuggling

Risk 82
Severity
7
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L

Apache Traffic Server allows request smuggling if chunked messages are malformed.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-57834

Apache Traffic ServerApache Traffic Server: HTTP/2 requests with Transfer-Encoding are not rejected, allowing request smuggling

Risk 73
Severity
7.8
AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Apache Traffic Server does not reject Transfer-Encoding in HTTP/2 requests, allowing downgrade request smuggling.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58150

Apache Traffic ServerApache Traffic Server: Abusive HTTP/2 framing can exhaust resources and crash the server

Risk 47
Severity
8.7
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Apache Traffic Server can be crashed or driven to resource exhaustion by abusive HTTP/2 framing and flow-control.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58151

Apache Traffic ServerApache Traffic Server: HTTP/2 and HTTP/3 dechunking removes per-stream buffer cap, allowing memory exhaustion

Risk 43
Severity
8.2
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Apache Traffic Server drops the per-stream buffer cap when dechunking HTTP/2 or HTTP/3 responses, letting a slow client exhaust server memory.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-65324

Apache Traffic ServerApache Traffic Server: Memory-safety and limit-bypass errors across experimental plugins

Risk 69
Severity
8.4
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Several Apache Traffic Server experimental plugins have memory-safety and limit-bypass errors.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58188

Apache Traffic ServerApache Traffic Server: Plugins resetting the redirect counter enable SSRF amplification

Risk 43
Severity
8.2
SSRF
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Apache Traffic Server allows redirect-limit bypass when plugins reset the retry counter, enabling SSRF amplification.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58189

Apache Traffic ServerApache Traffic Server: HostDB SRV handling leaks memory

Risk 43
Severity
8.2
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Apache Traffic Server leaks memory when handling HostDB SRV records.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58175

Apache Traffic ServerApache Traffic Server: ESI plugin allows uncontrolled recursion and server-side request forgery

Risk 43
Severity
8.2
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

The Apache Traffic Server ESI plugin can recurse without bound and fetch attacker-controlled URLs.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58178

Apache Traffic ServerApache Traffic Server: txn_box plugin overflows the stack from attacker input

Risk 43
Severity
8.2
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

The Apache Traffic Server txnbox plugin overflows the stack from attacker-controlled input.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58180

Apache Traffic ServerApache Traffic Server: uri_signing and url_sig plugins can exhaust the stack or crash

Risk 43
Severity
8.2
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

The Apache Traffic Server urisigning and urlsig plugins can exhaust the stack or crash on attacker input.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58181

Apache Traffic ServerApache Traffic Server: ts_lua plugin has initialization and resource-handling errors

Risk 64
Severity
8.2
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

The Apache Traffic Server tslua plugin mishandles initialization, transform context, and per-instance state.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58182

Apache Traffic ServerApache Traffic Server: prefetch plugin can crash on attacker-influenced input

Risk 43
Severity
8.2
Input Validation
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

The Apache Traffic Server prefetch plugin can crash when processing attacker-influenced input.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58183

Apache Traffic ServerApache Traffic Server: header_rewrite plugin cookie handling can corrupt memory

Risk 52
Severity
8.3
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

The Apache Traffic Server headerrewrite plugin can crash or corrupt memory during cookie operations and CIDR condition matching.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58184

Apache Traffic ServerApache Traffic Server: Use-after-free in the intercept plugin

Risk 86
Severity
8.2
Use After Free
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

The Apache Traffic Server intercept plugin has a use-after-free.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58185

Apache Traffic ServerApache Traffic Server: webp_transform plugin decodes unsafely and mislabels degraded responses

Risk 43
Severity
8.2
Input Validation
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

The Apache Traffic Server webptransform plugin can decode unsafely and serve mislabeled, cacheable responses.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

First published (updated )
CVE-2026-58186

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