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Advisory record · GHSA-j5mf-6rh3-rhgg

CleverTap Web SDK is vulnerable to DOM-based XSS via handleCustomHtmlPreviewPostMessageEvent function

CVSS 8.3 HighEPSS 0.0021 · 10th percentile

Published by the GitHub Advisory Database at 27 Feb 2026, 18:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
clevertap-web-sdknpm<1.15.31.15.3
Identifiers
GHSA-j5mf-6rh3-rhgg · CVE-2026-26861
Weakness (CWE)
CWE-79 · CWE-346
Tags
Published
27 Feb 2026
Updated
4 Mar 2026

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.3 High 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS 0.0021, the 10th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the GitHub Advisory Database, published 27 Feb 2026. New records show when each source confirmed them.

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.