6.8

CVE-2026-85717: asynchttpclient async-http-client

CVSS: 6.8v3.1MediumAwaiting analysis
AliasesUBUNTU-CVE-2026-85717CGA-26xh-82vx-4wr8CGA-288c-j9rp-5c6r
Published 17-09-2026Last modified 23-09-2026
Open JSON

Vulnerability summary

CVE-2026-85717 is a medium (CVSS 6.8) vulnerability in asynchttpclient async-http-client. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 43.6% of scored vulnerabilities.

Overall risk
27/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.8/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.53%
0%100%
Low · +0.20 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 17-09-2026
    PublishedVulnerability first disclosed.
  2. 23-09-2026
    Last modifiedVulnerability information updated.

Description

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.14.5 to 2.16.0 and from 3.0.9 to 3.0.11, a client configured with a client-wide Realm and redirect following can disclose credentials after a cross-origin redirect because the Interceptors authentication path falls back to the client configuration after redirect handling clears the per-exchange realm. If the attacker-controlled target returns 401, the client can send Basic or Digest credentials or a Negotiate or NTLM token to that origin. Per-request realms are stripped correctly, and this issue is a residual bypass of the earlier cross-origin credential-stripping fixes. This issue is fixed in versions 2.16.1 and 3.0.12.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.53%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

+0.20 pp

From 0.33% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.53%

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-4.0< 4.0.13-r5
  • apache-pulsar-4.2< 4.2.4-r4
  • apache-pulsar-fips-4.0< 4.0.13-r3
  • apache-pulsar-fips-4.2< 4.2.4-r4
  • druid< 37.0.0-r58
Wolfi3 products
  • apache-pulsar-4.2< 4.2.4-r4
  • druid< 37.0.0-r58
  • tez< 0.10.5-r31
Asynchttpclient1 product
Org.asynchttpclient1 product
  • async-http-client≥ 3.0.9, < 3.0.12 | ≥ 2.14.5, < 2.16.1
Ubuntu1 product
  • async-http-clientAll versions (No fix recorded)

5 vendors · 14 products

References

9 links