Traffic ServerApplication · Apache
CVE-2026-41920
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedImproper Access Control vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 9.0.0 through 9.1.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.1.15 or 10.1.4, which fixes the issue.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceImproper Access Control vulnerability in Apache Traffic Server, a reverse proxy and caching server. The vulnerability allows unauthorized access to certain functionality or resources due to missing or inadequate access controls, potentially enabling remote attackers to bypass intended security restrictions.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
Traffic ServerApplication
>= 9.0.0, < 9.2.15>= 10.0.0, < 10.1.4CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Determine installed Apache Traffic Server versionRun `trafficserver -V` or check via package manager (e.g., `rpm -q trafficserver` or `dpkg -l trafficserver`). Alternatively, check the binary: `/usr/bin/trafficserver -V`Affected if Version is 9.0.0 through 9.2.14, or 10.0.0 through 10.1.3 (falls within the affected ranges)
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Verify management interface exposureInspect the records.config file (typically in /etc/trafficserver/ or /usr/local/etc/trafficserver/). Look for `proxy.config.http.admin_server_port` and `proxy.config.http.admin_server_bind_address` settings. Check if port is set and whether it binds to 0.0.0.0 (all interfaces) vs 127.0.0.1 (localhost only)Affected if Management port is enabled and bound to a non-localhost address (0.0.0.0), exposing the interface to network access
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Inspect access control configurationReview the ACL configuration file (acl.config) or the `proxy.config.http.admin_user_id` and `proxy.config.http.admin_auth_required` settings in records.config. Check for any rules that may be missing or misconfigured for the management interfaceAffected if Access control rules are absent, misconfigured, or allow unauthenticated access to management or proxy functions
You are affected if your Apache Traffic Server version falls within 9.0.0-9.2.14 or 10.0.0-10.1.3 AND the management interface is network-exposed or access controls are missing.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped9.2.1510.1.4
Upgrade Apache Traffic Server to version 9.1.15 or 10.1.4 as recommended by the vendor to remediate this critical access control vulnerability.
9.1.15 (for 9.x line) or 10.1.4 (for 10.x line)
- 1. Identify the currently installed Apache Traffic Server version using 'traffic_server -V' or equivalent command
- 2. Backup all configuration files (records.yaml, remap.config, and any custom configurations in /etc/traffic_server/ or similar)
- 3. Stop the Apache Traffic Server service
- 4. Download the fixed version (9.1.15 for 9.x line or 10.1.4 for 10.x line) from the official Apache Traffic Server download page or repository
- 5. Install the new version using your system's package manager or from source, replacing the existing installation
- 6. Restore the backed-up configuration files to their original locations
- 7. Start the Apache Traffic Server service
- 8. Verify the version installed is correct using 'traffic_server -V'
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Traffic Server
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing8.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,288.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-41920 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-41920 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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