CVE-2026-65655: Software Security Vulnerability Vulnerability

LOW
Advisory Identifier: GHSA-c7mm-29xf-mmqp
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CWE-614
Published
Advisory Summary

CVE-2026-65655 is a LOW security vulnerability vulnerability (CWE-614: Sensitive Cookie in HTTPS Session Without 'Secure' Attribute) affecting Software libraries in the Maven ecosystem. The weakness occurs when the secure attribute for sensitive cookies in https sessions is not set.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-65655 at a Glance

CVE Identifier CVE-2026-65655
GHSA Identifier GHSA-c7mm-29xf-mmqp
Severity LOW
CVSS v3.1 Base Score N/A
CWE Classification CWE-614: Sensitive Cookie in HTTPS Session Without 'Secure' Attribute
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-65655

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-65655, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-614: Sensitive Cookie in HTTPS Session Without 'Secure' Attribute, where the secure attribute for sensitive cookies in https sessions is not set. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

When OAuth authentication is enabled and browser-facing TLS terminates at a reverse proxy that forwards the callback to Temporal UI Server over HTTP, affected versions derive authentication-cookie Secure attributes from the proxy-to-server connection. Temporal UI Server can therefore issue access-token cookies, and refresh-token cookies when provided by the identity provider, without Secure even though the browser completed login over HTTPS. A victim who visits attacker-controlled content while a credential remains live may expose that credential only if the attacker can also steer traffic for the UI hostname, prevent the browser's HTTPS connection from succeeding, serve the hostname over HTTP, and read a later same-site plaintext request. A malicious website alone cannot read the cookie, and passive observation of a successful TLS connection is insufficient. Effective HSTS, a blocking HTTPS-only warning, or TLS re-encryption between the proxy and Temporal UI Server prevents the demonstrated disclosure path. A recovered credential may be replayed within the victim's assigned permissions. Refresh-token replay additionally depends on the identity provider's issuance, expiry, rotation, and reuse-detection behavior.

References

NVD — CVE-2026-65655 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-65655
Software Source Repository REPOSITORY
https://github.com/temporalio/ui/pull/3806
Security Fix Commit FIX COMMIT
https://github.com/temporalio/ui-server/commit/7b9ff533fb51beba75497c0a192c66775c08f279
Security Fix Commit FIX COMMIT
https://github.com/temporalio/ui-server/commit/821cf598371353f1b579dfe1e87aeb3638b041d6
Security Fix Commit FIX COMMIT
https://github.com/temporalio/ui-server/commit/8876b80b63003688ab736f45ef28885695a4f6db
Software Source Repository REPOSITORY
https://github.com/temporalio/ui-server/blob/v2.53.1/server/auth/auth.go#L87-L153
Software Source Repository REPOSITORY
https://github.com/temporalio/ui-server/blob/v2.53.1/server/route/auth.go#L281-L316
Software Release RELEASE
https://github.com/temporalio/ui-server/releases/tag/v2.53.1
Software Release RELEASE
https://github.com/temporalio/ui-server/releases/tag/v2.53.2

Frequently Asked Questions

What is CVE-2026-65655?
CVE-2026-65655 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-614: Sensitive Cookie in HTTPS Session Without 'Secure' Attribute.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-65655?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-65655?
CVE-2026-65655 is classified under CWE-614: Sensitive Cookie in HTTPS Session Without 'Secure' Attribute (The Secure attribute for sensitive cookies in HTTPS sessions is not set.).
How can I check Maven dependencies for CVE-2026-65655?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-c7mm-29xf-mmqp",
  "modified" : "2026-08-11T21:33:10Z",
  "published" : "2026-08-11T21:33:10Z",
  "aliases" : [ "CVE-2026-65655" ],
  "details" : "When OAuth authentication is enabled and browser-facing TLS terminates at a reverse proxy that forwards the callback to Temporal UI Server over HTTP, affected versions derive authentication-cookie Secure attributes from the proxy-to-server connection. Temporal UI Server can therefore issue access-token cookies, and refresh-token cookies when provided by the identity provider, without Secure even though the browser completed login over HTTPS.\n\n\n\nA victim who visits attacker-controlled content while a credential remains live may expose that credential only if the attacker can also steer traffic for the UI hostname, prevent the browser's HTTPS connection from succeeding, serve the hostname over HTTP, and read a later same-site plaintext request. A malicious website alone cannot read the cookie, and passive observation of a successful TLS connection is insufficient. Effective HSTS, a blocking HTTPS-only warning, or TLS re-encryption between the proxy and Temporal UI Server prevents the demonstrated disclosure path.\n\n\n\nA recovered credential may be replayed within the victim's assigned permissions. Refresh-token replay additionally depends on the identity provider's issuance, expiry, rotation, and reuse-detection behavior.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-65655"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/temporalio/ui/pull/3806"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/temporalio/ui-server/commit/7b9ff533fb51beba75497c0a192c66775c08f279"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/temporalio/ui-server/commit/821cf598371353f1b579dfe1e87aeb3638b041d6"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/temporalio/ui-server/commit/8876b80b63003688ab736f45ef28885695a4f6db"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/temporalio/ui-server/blob/v2.53.1/server/auth/auth.go#L87-L153"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/temporalio/ui-server/blob/v2.53.1/server/route/auth.go#L281-L316"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/temporalio/ui-server/releases/tag/v2.53.1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/temporalio/ui-server/releases/tag/v2.53.2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-614" ],
    "severity" : "LOW",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-11T20:18:31Z"
  }
}