Apache Traffic Server 6.0.0 to 6.2.0 are affected by an HPACK Bomb Attack.
Priority LOW 38CWE-399Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-399 and the CVSS impact.
Summary
Apache Traffic Server 6.0.0 to 6.2.0 are affected by an HPACK Bomb Attack.
Why it matters now
EPSS 0.02881 86th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache Traffic Server | 6.0.0 to 6.2.0 | — | No fix listed | CNA |
- Apache Traffic Server VendorApache Affected 6.0.0 to 6.2.0 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apache:traffic_server:6.0.0:*:*:*:*:*:*:* | 6.0.0 | Vulnerable | Apache |
| cpe:2.3:a:apache:traffic_server:6.1.0:*:*:*:*:*:*:* | 6.1.0 | Vulnerable | Apache |
| cpe:2.3:a:apache:traffic_server:6.1.1:*:*:*:*:*:*:* | 6.1.1 | Vulnerable | Apache |
| cpe:2.3:a:apache:traffic_server:6.2.0:*:*:*:*:*:*:* | 6.2.0 | Vulnerable | Apache |
- cpe:2.3:a:apache:traffic_server:6.0.0:*:*:*:*:*:*:* Versions 6.0.0 Vulnerable ·Apache
- cpe:2.3:a:apache:traffic_server:6.1.0:*:*:*:*:*:*:* Versions 6.1.0 Vulnerable ·Apache
- cpe:2.3:a:apache:traffic_server:6.1.1:*:*:*:*:*:*:* Versions 6.1.1 Vulnerable ·Apache
- cpe:2.3:a:apache:traffic_server:6.2.0:*:*:*:*:*:*:* Versions 6.2.0 Vulnerable ·Apache
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2016-5396
- 2026-10-03 Alias added: GHSA-4r32-4xgr-6w96
References
More Apache Traffic Server vulnerabilities
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
- TI-2024-20685 Apache Traffic Server: HTTP/2 CONTINUATION frames can be utilized for DoS attack CVSS 3.1HIGH 7.5
- TI-2019-06950 Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a… CVSS 3.1HIGH 7.5
- TI-2019-06949 Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a… CVSS 3.1HIGH 7.5
- TI-2019-06947 Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a… CVSS 3.1HIGH 7.5
- TI-2023-20588 Apache Traffic Server: Malformed http/2 frames can cause an abort CVSS 3.1HIGH 7.5
Sources
- CVE-2016-5396 · CVE Program
- CVE-2016-5396 · NVD
- FIRST EPSS
- GHSA-4r32-4xgr-6w96 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences