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CVE-2026-65654— temporalio/ringpop-go fails to enforce configured label limits on inbound membership gossip

Quick assessment

Affected
Temporal Technologies, Inc. temporalio/ringpop-go
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

github.com/temporalio/ringpop-go 在应用程序修改本地节点标签时，会强制执行已配置的 LabelOptions 限制。然而，受影响的版本并未对通过 SWIM 成员变更接收到的标签映射应用这些限制。任何能够访问正在运行的 Ringpop TChannel 监听器的网络对端，都可以反复提交针对不同成员地址的变更，其中包含的标签键、值或数量超出接收方配置的限制。被接受的标签会保留在成员列表中，并传播给其他对等节点，从而可能导致内存占用和 gossip 带宽消耗超出配置上限，甚至使宿主进程变得

CVSS 8.7 · High EPSS 0.58% · P48

Affected Version Matrix 1

VendorProduct Version RangeStatus
Temporal Technologies, Inc. temporalio/ringpop-go 0.0.0-20160824133849-d0de5fe13330< 0.0.0-20260724173031-c317effcdc8b affected
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I. Basic Information for CVE-2026-65654

Vulnerability Information
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Vulnerability Title
temporalio/ringpop-go fails to enforce configured label limits on inbound membership gossip
Source: CVE Program / CVE List V5
Vulnerability Description
github.com/temporalio/ringpop-go enforces configured LabelOptions limits when an application changes the local node's labels, but affected versions do not apply those limits to label maps received in SWIM membership changes. A network peer that can reach a live Ringpop TChannel listener can repeatedly submit changes for distinct member addresses containing label keys, values, or counts that exceed the receiver's configured limits. Accepted labels are retained in the member list and disseminated to peers, allowing memory and gossip-bandwidth consumption to exceed configured bounds and potentially making the hosting process unavailable. The fix validates peer-supplied label maps before they are retained or disseminated. Availability only; no confidentiality or integrity impact was identified.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Temporal Technologies, Inc. temporalio/ringpop-go 0.0.0-20160824133849-d0de5fe13330 ~ 0.0.0-20260724173031-c317effcdc8b -

II. Public POCs for CVE-2026-65654

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III. Intelligence Information for CVE-2026-65654

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Patches & Fixes for CVE-2026-65654 (2)

Other References for CVE-2026-65654 (3)

Same Patch Batch · Temporal Technologies, Inc. · 2026-09-21 · 8 CVEs total

CVE-2026-89139 8.7 HIGH Temporal Server worker deployment compute provider executes a caller-supplied command on t
CVE-2026-65653 8.7 HIGH temporalio/tchannel-go zero-chunk call fragment causes process termination
CVE-2026-65652 8.7 HIGH temporalio/tchannel-go malformed checksum type causes process termination
CVE-2026-87858 7.2 HIGH Temporal Server completion callback source header can direct attacker-chosen requests to t
CVE-2026-16652 7.1 HIGH Temporal Server Schedule exclusion search can cause excessive CPU consumption
CVE-2026-16651 7.1 HIGH temporalio/sqlparser malformed MySQL version comments can cause a panic
CVE-2026-65651 6.0 MEDIUM temporalio/sqlparser deeply nested unary expressions can cause a fatal stack overflow duri

IV. Related Vulnerabilities

Same vendor: Temporal Technologies, Inc.
Same weakness: CWE-770