The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.13 and 2.16.1, the HTTP/1.1 connection-pool key excludes the authenticated principal for connection-oriented NTLM and Negotiate authentication. A pooled socket authenticated for one request can be reused by a request carrying another principal, and the server executes that later request as the first identity. Basic and Digest are not affected because they authenticate each request. This issue is fixed in versions 3.0.13 and 2.16.1.
CVE-2026-107281
HIGHPre-NVD 7.67.6—Trending — 3 sources updated this week
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 7.6 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (5th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.6Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 7.6
- EG Score
- 7.6HIGHmedium confidence
- EG Risk
- 34EG Risk 34/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity76% × 45%Exploitation0% × 40%Automatability0% × 15%CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.2%
- EPSS %ILE
- 5th
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 7, 2026
Last Modified
October 8, 2026
Advisory Details (5)
Auto-updated Oct 7, 2026Patch available. Sources: github, github_commit, github_release.
github_release Patch Available
AHC v3.0.13 Release
Patch available: AsyncHttpClient/async-http-client async-http-client-project-3.0.13
https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.13github_release Patch Available
AHC v2.16.1 Release
Patch available: AsyncHttpClient/async-http-client async-http-client-project-2.16.1
https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1github_commit Patch Available
commit 83e552e64cab (AsyncHttpClient/async-http-client)
Patch available: AsyncHttpClient/async-http-client async-http-client-project-3.0.13 (contains commit 83e552e64cab)
https://github.com/AsyncHttpClient/async-http-client/commit/83e552e64cabab2119addb6b47f7c6482997c94egithub_commit Patch Available
commit 73813babf512 (AsyncHttpClient/async-http-client)
Patch available: AsyncHttpClient/async-http-client async-http-client-project-2.16.1 (contains commit 73813babf512)
https://github.com/AsyncHttpClient/async-http-client/commit/73813babf51231ee79f7da4f07b777f19f48d34dgithubMentions a patch (unverified)
Connection pool key omits the authenticated principal, so an NTLM or Negotiate connection is reused across identities · Advisory · AsyncHttpClient/async-http-client · GitHub
Affected: 3.0.13 on the 3.x line and in 2.16.1 on the 2.x line. The authenticated principal
https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-vvp4-63h8-v5pmWeakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 8× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-10-09 21:15 UTCEG score recompute
- 2026-10-09 20:06 UTCEPSS rescore
- 2026-10-08 18:40 UTCEG score recompute
- 2026-10-08 18:15 UTCEG score recompute
- 2026-10-08 17:11 UTCEPSS rescore
- 2026-10-07 22:25 UTCEG score recompute
- 2026-10-07 21:22 UTCEG score recompute
- 2026-10-07 21:21 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-107281?
CVE-2026-107281 is a high vulnerability published on October 7, 2026. The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.13 and 2.16.1, the HTTP/1.1 connection-pool key excludes the authenticated principal for connection-oriented NTLM and Negotiate authentication. A pooled…
When was CVE-2026-107281 disclosed?
CVE-2026-107281 was first published on October 7, 2026, with the most recent update on October 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-107281 actively exploited?
CVE-2026-107281 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-107281?
CVE-2026-107281 has a CVSS base score of 7.6 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-107281?
A fix for CVE-2026-107281 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-107281
Is Your Infrastructure Affected by CVE-2026-107281?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.