CVE-2016-6581 describes a denial-of-service vulnerability, known as an "HPACK Bomb," affecting HTTP/2 implementations utilizing Python HPACK library versions 1.0.0 to 2.2.0. An attacker can exploit this by sending specially crafted header fields that, upon decompression, expand to a significantly larger size (e.g., 16KB expanding to 64MB), consuming excessive resources. This vulnerability has a CVSSv3 score of 7.5 (HIGH), indicating a network-based attack with low complexity and a high impact on availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
1.0CPE matchmatch criteria | cpe:2.3:a:python:hpack:1.0:*:*:*:*:*:*:* | ||
2.0CPE matchmatch criteria | cpe:2.3:a:python:hpack:2.0:*:*:*:*:*:*:* | ||
2.0.1CPE matchmatch criteria | cpe:2.3:a:python:hpack:2.0.1:*:*:*:*:*:*:* | ||
2.1.1CPE matchmatch criteria | cpe:2.3:a:python:hpack:2.1.1:*:*:*:*:*:*:* | ||
2.2CPE matchmatch criteria | cpe:2.3:a:python:hpack:2.2:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.