Bug 2567441 (CVE-2026-110802)

Summary: CVE-2026-110802 altair: Altair: Cross-site scripting via crafted iframe sandbox URL
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Altair. The application improperly handles script URLs supplied through URL query parameters in its iframe sandbox, allowing external scripts to be injected into the page without proper sandbox isolation. By convincing a victim to navigate to a specially crafted link, a remote attacker can execute arbitrary scripts within the context of the application's origin. This can lead to cross-site scripting (XSS), allowing the attacker to access sensitive stored data or perform unauthorized actions on behalf of the victim.
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Description OSIDB Bzimport 2026-11-05 21:58:00 UTC 
Altair is a GraphQL client for all platforms. From 7.2.4 until 8.5.8, packages/altair-iframe-sandbox/src/main.ts reads plugin_sandbox_opts from the iframe-sandbox query string and passes attacker-controlled scriptUrls to injectScript() in packages/altair-core/src/utils/inject.ts, which creates script elements in the page. The intended parent iframe flow places the page in an iframe with sandbox allow-scripts and without allow-same-origin, but direct navigation to a crafted iframe-sandbox URL omits that isolation and executes the supplied script in the origin serving Altair. Exploitation requires a victim to open the crafted URL, and the resulting script can access script-readable storage and make same-origin requests according to the deployment's authentication and cookie controls. This issue is fixed in version 8.5.8.