VulnSocial

CVE-2026-26861Disclosure(clevertap / clevertap_web_sdk)

LOWCVSS 8.3 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

CleverTap Web SDK version 1.15.2 and earlier is vulnerable to Cross-Site Scripting (XSS) via window.postMessage. The handleCustomHtmlPreviewPostMessageEvent function in src/util/campaignRender/nativeDisplay.js performs insufficient origin validation using the includes() method, which can be bypassed by an attacker using a subdomain

clevertap CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Patch / fix
Exploit / PoC references
Other references
Weakness type (CWE)
CWE-346

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • clevertap_web_sdk

Threat summary

  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 3 signals
  • Disclosure: 3 classified signals
  • Peaked 1d ago at 2 mentions (2026-02-27); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
clevertap
Products
clevertap_web_sdk

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-02-27: 2Mentions · 2026-03-04: 1Technical Details · 2026-02-27: 2Technical Details · 2026-03-04: 102-2703-04
Signal classification1 categories
Disclosure
3100.0%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-02-272
Disclosure2
2026-03-041
Disclosure1
Full discourse3 posts
  • CRAC Learning - Tech@cracbot
    Disclosure

    CVE-2026-26861 (CVSS:8.3, HIGH) is Analyzed. CleverTap Web SDK version 1.15.2 and earlier is vulnerable to Cross-Site Scripting (XSS) via window.postMessage. The han..https://nvd.nist.gov/vuln/detail/CVE-2026-26861 #cybersecurityawareness #cybersecurity #CVE #infosec #hacker #nvd #mitre

    Post summary

    The post announces that CleverTap Web SDK v1.15.2 and earlier are vulnerable to XSS via window.postMessage, with a CVSS score of 8.3, but does not provide a PoC, exploit, or patch information.

    0000037
    173 followersView on X
  • The Hacker Wire@TheHackerWire
    Disclosure

    🟠 CVE-2026-26861 - High CleverTap Web SDK version 1.15.2 and earlier is vulnerable to Cross-Site Scripting (XSS) via window.postMessage. The handleCustomHtmlPreviewPostMessageEvent function in src/util/campaignRende... https://www.thehackerwire.com/vulnerability/CVE-2026-26861/ https://t.co/yGM037NogU

    Post summary

    CleverTap Web SDK versions 1.15.2 and earlier have a high‑severity XSS flaw triggered by window.postMessage, as detailed in The Hacker Wire article.

    0000063
    119 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-26861 CleverTap Web SDK version 1.15.2 and earlier is vulnerable to Cross-Site Scripting (XSS) via window.postMessage. The handleCustomHtmlPreviewPostMessageEvent function … https://www.cve.org/CVERecord?id=CVE-2026-26861

    Post summary

    The advisory announces a cross‑site scripting vulnerability (CVE‑2026‑26861) in CleverTap Web SDK v1.15.2 and earlier, triggered via window.postMessage; no PoC, exploit, or patch details are provided.

    00000103
    56.6K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appclevertapclevertap_web_sdk---

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