CVE-2026-107280

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (16th 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
Trending — 3 sources updated this week
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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, ThreadSafeCookieStore validates Domain attributes with domain matching but does not reject public suffixes. A host beneath a suffix such as co.uk can set a cookie for that suffix, after which the shared cookie store sends it to unrelated hosts under the suffix. This can inject or overwrite session-relevant cookie values across origins. This issue is fixed in versions 3.0.13 and 2.16.1.

CVSS v3
6.9
EG Score
6.9MEDIUMmedium confidence
EG Risk
31
EG Risk 31/100CISA 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 computed
Severity69% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
16th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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, 2026
Patch 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-3.0.13
github_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-2.16.1
github_commit Patch Available

commit d1f0ccec4170 (AsyncHttpClient/async-http-client)

Patch available: AsyncHttpClient/async-http-client async-http-client-project-2.16.1 (contains commit d1f0ccec4170)

https://github.com/AsyncHttpClient/async-http-client/commit/d1f0ccec417092098d40242fee7dfac84bb3c21f
github_commit Patch Available

commit 330267895fe0 (AsyncHttpClient/async-http-client)

Patch available: AsyncHttpClient/async-http-client async-http-client-project-3.0.13 (contains commit 330267895fe0)

https://github.com/AsyncHttpClient/async-http-client/commit/330267895fe0bdb41bbd027ea6b151d38ee7c23d
githubMentions a patch (unverified)

Cookie Domain attribute is not checked against the public suffix list, so a cookie can be set for co.uk · Advisory · AsyncHttpClient/async-http-client · GitHub

Affected: 3.0.13 on the 3.x line. The ICANN section of the Mozilla public suffix list is bu

https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-f9m8-cv68-674w

Vendor Advisories for CVE-2026-107280(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFix by version rangeDependents
org.asynchttpclient:async-http-client3.0.0 ... 3.0.9 (13 versions)
  • 3.0.0 up to 3.0.13: fixed in 3.0.13
  • 2.0.0 up to 2.16.1: fixed in 2.16.1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 7× 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.

  1. 2026-10-09 20:06 UTCEPSS rescore
  2. 2026-10-08 18:40 UTCEG score recompute
  3. 2026-10-08 18:01 UTCEG score recompute
  4. 2026-10-08 17:11 UTCEPSS rescore
  5. 2026-10-07 22:25 UTCEG score recompute
  6. 2026-10-07 21:22 UTCEG score recompute
  7. 2026-10-07 21:21 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-107280?
CVE-2026-107280 is a medium 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, ThreadSafeCookieStore validates Domain attributes with domain matching but does not reject public suffixes. A host beneath a suffix such…
When was CVE-2026-107280 disclosed?
CVE-2026-107280 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-2026-107280 actively exploited?
CVE-2026-107280 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (16th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-107280?
CVE-2026-107280 has a CVSS base score of 6.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-107280?
A fix for CVE-2026-107280 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-107280 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-107280

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