CVE-2026-40490

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.41% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 35.4% of scored records. A rank, not a probability.

NVD base score

6.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

NVD analysis status

Deferred. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-04-18 01:31Z6 MO AGO

Last updated

2026-04-20 14:55Z6 MO AGO

Reserved

2026-04-13

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 6.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

Weaknesses

• CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
• CWE-346Origin Validation ErrorClass

Data version

5.2

Document digest

bc7f9818d1d204b275d1795d913ac13da1d1abfe77ecf7d1d396c744ce11459d

• github.comhttps://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-cmxv-58fp-fm3gx_refsource_CONFIRM
• github.comhttps://github.com/AsyncHttpClient/async-http-client/commit/6b2fbb7f8x_refsource_MISC
• github.comhttps://github.com/AsyncHttpClient/async-http-client/commit/ae557ad35246721c09dafb2976609cd0004e78aex_refsource_MISC
• github.comhttps://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.14.5x_refsource_MISC
• github.comhttps://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.9x_refsource_MISC