CVE-2026-65655

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

0.37% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 30.9% of scored records. A rank, not a probability.

NVD base score

2.3 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-10-24.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2026-08-11 19:29Z2 MO AGO

Last updated

2026-08-11 20:15Z2 MO AGO

Reserved

2026-07-22

Assigning CNA

Temporal

Record state

PUBLISHED

Severity

Low (CVSS 2.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-614Sensitive Cookie in HTTPS Session Without 'Secure' AttributeVariant

Data version

5.2

Document digest

1a8c55c84895f01989121c61bc622d3f7eda620c8f92ddb5065d241f808db378

• github.comAccess-token cookie implementation introduced in v2.7.0https://github.com/temporalio/ui-server/commit/821cf598371353f1b579dfe1e87aeb3638b041d6
• github.comRefresh-token cookie implementation introduced in v2.45.2https://github.com/temporalio/ui-server/commit/7b9ff533fb51beba75497c0a192c66775c08f279
• github.comAffected OAuth credential-cookie implementation in v2.53.1https://github.com/temporalio/ui-server/blob/v2.53.1/server/auth/auth.go#L87-L153
• github.comAffected route-cookie implementation in v2.53.1https://github.com/temporalio/ui-server/blob/v2.53.1/server/route/auth.go#L281-L316
• github.comLatest confirmed affected releasehttps://github.com/temporalio/ui-server/releases/tag/v2.53.1release-notes
• github.comFix pull requesthttps://github.com/temporalio/ui/pull/3806patch
• github.comFix mirrored to Temporal UI Serverhttps://github.com/temporalio/ui-server/commit/8876b80b63003688ab736f45ef28885695a4f6dbpatch
• github.comFirst fixed releasehttps://github.com/temporalio/ui-server/releases/tag/v2.53.2release-notes