Vulnerability Report

CVE-2016-6580

Title: Python Python Priority Library

Other

Proof Of Concept

No public PoC currently indexed for CVE-2016-6580.

CWE Category CWE-399
Published Date Jan 10, 2017
Modified Date Jun 17, 2026
Exploit Status Not Found
Score 7.5 CVSS v3.0
Exploit Probability (EPSS)
1.79%

Vulnerability Summary

CVE-2016-6580: A HTTP/2 implementation built using any version of the Python priority library prior to version 1.2.0 could be targeted by a malicious peer by having that peer assign priority information for every possible HTTP/2 stream ID. The priority tree would happily continue to store the priority information for each stream, and would therefore allocate unbounded amounts of memory. Attempting to actually use a tree like this would also cause extremely high CPU usage to maintain the tree.

Impacted Vendors

P
python 1

Reference Links

http://www.securityfocus.com/bid/92311 https://python-hyper.org/priority/en/latest/security/CVE-2016-6580.html http://www.securityfocus.com/bid/92311 https://python-hyper.org/priority/en/latest/security/CVE-2016-6580.html
CVSS v3.0
Source Entity [email protected]
Severity HIGH
7.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2016-6580 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Stack

No specific products linked.