CVE-2026-58155
published 2026-07-29CVE-2026-58155: Apache Traffic Server truncates over-long header names, allowing header aliasing, request smuggling, and policy bypass. This issue affects Apache Traffic…
PriorityP260critical9.3CVSS 3.1
AVNACLPRNUINSCCLIHAN
EPSS
0.40%
34.5th percentile
Apache Traffic Server truncates over-long header names, allowing header aliasing, request smuggling, and policy bypass.
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.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | traffic_server | >= 10.0.0 < 10.1.4 | 10.1.4 |
| apache | traffic_server | 8.0.0 – 8.1.9 | — |
| apache | traffic_server | >= 9.0.0 < 9.2.15 | 9.2.15 |
| apache_software_foundation | apache_traffic_server | 10.0.0 – 10.1.3 | — |
| apache_software_foundation | apache_traffic_server | 8.0.0 – 8.1.9 | — |
| apache_software_foundation | apache_traffic_server | 9.0.0 – 9.2.14 | — |
CVSS provenance
nvdv3.19.3CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
nvdv4.09.2CRITICALCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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VulDB
Apache Traffic Server up to 8.1.9/9.2.14/10.1.3 request smuggling (EUVD-2026-50209 / Nessus ID 333156)
vuldb·2026-08-07·CVSS 9.3
CVE-2026-58155 [CRITICAL] Apache Traffic Server up to 8.1.9/9.2.14/10.1.3 request smuggling (EUVD-2026-50209 / Nessus ID 333156)
A vulnerability was found in Apache Traffic Server up to 8.1.9/9.2.14/10.1.3. It has been classified as problematic. This affects an unknown function. The manipulation leads to http request smuggling.
This vulnerability is referenced as CVE-2026-58155. Remote exploitation of the attack is possible. No exploit is available.
Upgrading the affected component is recommended.
GHSA
Apache Traffic Server truncates over-long header names, allowing header aliasing, request smuggling, and policy bypass.
ghsa_unreviewed·2026-07-29
CVE-2026-58155 [CRITICAL] CWE-444 Apache Traffic Server truncates over-long header names, allowing header aliasing, request smuggling, and policy bypass.
Apache Traffic Server truncates over-long header names, allowing header aliasing, request smuggling, and policy bypass.
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.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-58155 trafficserver: header-name length truncation enables header aliasing and request smuggling [fedora-all]
bugzilla·2026-07-29·CVSS 9.3
CVE-2026-58155 [CRITICAL] CVE-2026-58155 trafficserver: header-name length truncation enables header aliasing and request smuggling [fedora-all]
CVE-2026-58155 trafficserver: header-name length truncation enables header aliasing and request smuggling [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Apache Traffic Server truncates over-long header names, allowing header aliasing, request smuggling, and policy bypass.
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.
Bugzilla
CVE-2026-58155 Apache Traffic Server: header-name length truncation enables header aliasing and request smuggling
bugzilla·2026-07-29·CVSS 9.3
CVE-2026-58155 [CRITICAL] CVE-2026-58155 Apache Traffic Server: header-name length truncation enables header aliasing and request smuggling
CVE-2026-58155 Apache Traffic Server: header-name length truncation enables header aliasing and request smuggling
Apache Traffic Server truncates over-long header names, allowing header aliasing, request smuggling, and policy bypass.
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.
Bugzilla
CVE-2026-58155 trafficserver: header-name length truncation enables header aliasing and request smuggling [epel-all]
bugzilla·2026-07-29·CVSS 9.3
CVE-2026-58155 [CRITICAL] CVE-2026-58155 trafficserver: header-name length truncation enables header aliasing and request smuggling [epel-all]
CVE-2026-58155 trafficserver: header-name length truncation enables header aliasing and request smuggling [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Apache Traffic Server truncates over-long header names, allowing header aliasing, request smuggling, and policy bypass.
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.
2026-07-29
Published