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CVE-2026-55688

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. In versions from 2.0.0 prior to 2.16.0 and from 3.0.0.Beta1 prior to 3.0.11, ThreadSafeCookieStore stored a cookie under the value of its Domain attribute without verifying that the responding host is allowed to set a cookie for that domain, leading to a cookie tossing / cookie injection issue. A host the client connects to can therefore plant a cookie scoped to a
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:70fee4bd0ec964c62017ebc05a2aecf0feadb3f16c7fd2e11a035ce140413590
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"async-http-client","vendor":"AsyncHttpClient","versions":[{"status":"affected","version":">= 2.0.0, < 2.16.0"},{"status":"affected","version":">= 3.0.0.Beta1, < 3.0.11"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0beba5fab8b08ed88c39ecbd2729df431eca6da6154609dc3e4eb11044307eea · sha256:503bb284e355b296… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0beba5fab8b08ed88c39ecbd2729df431eca6da6154609dc3e4eb11044307eea · sha256:503bb284e355b296… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-1275","description":"CWE-1275: Sensitive Cookie with Improper SameSite Attribute","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0beba5fab8b08ed88c39ecbd2729df431eca6da6154609dc3e4eb11044307eea · sha256:503bb284e355b296… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/AsyncHttpClient/async-http-client/pull/2196","tags":["x_refsource_MISC"],"url":"https://github.com/AsyncHttpClient/async-http-client/pull/2196"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0beba5fab8b08ed88c39ecbd2729df431eca6da6154609dc3e4eb11044307eea · sha256:503bb284e355b296… · /containers/cna/references/1
{"name":"https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-m452-q8c9-rg2f","tags":["x_refsource_CONFIRM"],"url":"https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-m452-q8c9-rg2f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0beba5fab8b08ed88c39ecbd2729df431eca6da6154609dc3e4eb11044307eea · sha256:503bb284e355b296… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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