The HTTP/2 protocol does not consider the role of the TCP congestion window in providing…
Priority LOW 38CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-200.
Summary
The HTTP/2 protocol does not consider the role of the TCP congestion window in providing information about content length, which makes it easier for remote attackers to obtain cleartext data by leveraging a web-browser configuration in which third-party cookies are sent, aka a "HEIST" attack.
Why it matters now
EPSS 0.12766 96th 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 |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:microsoft:edge:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:microsoft:internet_explorer:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:a:google:chrome:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | |
| cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* | all versions | Vulnerable | Apple |
| cpe:2.3:a:opera:opera_browser:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Opera |
| cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* | all versions | Vulnerable | Mozilla |
- cpe:2.3:a:microsoft:edge:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:microsoft:internet_explorer:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:a:google:chrome:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Google
- cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Apple
- cpe:2.3:a:opera:opera_browser:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Opera
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Mozilla
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 1 product
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2016-7153
- 2026-10-03 Alias added: GHSA-64x6-q8pq-xjmg
References
Sources
- CVE-2016-7153 · CVE Program
- CVE-2016-7153 · NVD
- FIRST EPSS
- GHSA-64x6-q8pq-xjmg · GitHub Advisory Database · CC BY 4.0
- CVE-2016-7153 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences