7.5

CVE-2026-107227: asynchttpclient async-http-client Uncontrolled Resource Consumption

CVSS: 7.5v3.1HighAwaiting analysis
AliasesUBUNTU-CVE-2026-107227DEBIAN-CVE-2026-107227CGA-36jv-fpw6-p4jx
Published 07-10-2026Last modified 08-10-2026
Open JSON

Vulnerability summary

CVE-2026-107227 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in asynchttpclient async-http-client. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 36% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.43%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 07-10-2026
    PublishedVulnerability first disclosed.
  2. 08-10-2026
    Last modifiedVulnerability information updated.

Description

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.2.0 until 3.0.14, WebSocket permessage-deflate decompression is unbounded when compression is enabled. The inbound pipeline aggregates compressed frames before WebSocketClientCompressionHandler inflates them, so webSocketMaxFrameSize and webSocketMaxBufferSize do not bound decompressed output. A malicious WebSocket peer can send a small compressed message that expands to a very large Netty buffer and exhausts JVM heap. This issue is fixed in version 3.0.14.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

36%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

08-10-202620-10-2026
EPSS score
0.43%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard8 products
  • apache-pulsar-4.0All versions (No fix recorded)
  • apache-pulsar-4.2All versions (No fix recorded)
  • apache-pulsar-fips-4.0All versions (No fix recorded)
  • apache-pulsar-fips-4.2All versions (No fix recorded)
  • druid< 38.0.0-r4
Wolfi3 products
  • apache-pulsar-4.2All versions (No fix recorded)
  • druid< 38.0.0-r4
  • tezAll versions (No fix recorded)
Asynchttpclient1 product
Debian1 product
  • async-http-clientAll versions (No fix recorded)
Org.asynchttpclient1 product
  • async-http-client≥ 3.0.0, < 3.0.14 | ≥ 2.2.0, ≤ 2.16.1
Ubuntu1 product
  • async-http-clientAll versions (No fix recorded)

6 vendors · 15 products

References

9 links