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CVE Explorer

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 in src/util/campaignRender/nativeDisplay.js performs insufficient origin validation using the includes() method, which can be bypassed by an attacker using a subdomain
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4ce9f35e1ad47156bc2e61c62600461d3a0fe79cb5fd192d8020bfbf948ae3b4
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-346","description":"CWE-346 Origin Validation Error","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0152b1772454e3a7fe06f97ed5ba9ea383abe65e9c77756e20332157a5f69e25 · sha256:c6a18d5c261eb74e… · /containers/adp/0/problemTypes/0/descriptions/0

{"description":"n/a","lang":"en","type":"text"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0152b1772454e3a7fe06f97ed5ba9ea383abe65e9c77756e20332157a5f69e25 · sha256:c6a18d5c261eb74e… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:0152b1772454e3a7fe06f97ed5ba9ea383abe65e9c77756e20332157a5f69e25 · sha256:c6a18d5c261eb74e… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.3,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:0152b1772454e3a7fe06f97ed5ba9ea383abe65e9c77756e20332157a5f69e25 · sha256:c6a18d5c261eb74e… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-346","description":"CWE-346 Origin Validation Error","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0152b1772454e3a7fe06f97ed5ba9ea383abe65e9c77756e20332157a5f69e25 · sha256:c6a18d5c261eb74e… · /containers/adp/0/problemTypes/0/descriptions/0
{"description":"n/a","lang":"en","type":"text"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:0152b1772454e3a7fe06f97ed5ba9ea383abe65e9c77756e20332157a5f69e25 · sha256:c6a18d5c261eb74e… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"url":"https://github.com/CleverTap/clevertap-web-sdk/blob/cf1b65d/src/util/campaignRender/nativeDisplay.js#L118-L121"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0152b1772454e3a7fe06f97ed5ba9ea383abe65e9c77756e20332157a5f69e25 · sha256:c6a18d5c261eb74e… · /containers/cna/references/2
{"url":"https://github.com/CleverTap/clevertap-web-sdk/issues/424"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0152b1772454e3a7fe06f97ed5ba9ea383abe65e9c77756e20332157a5f69e25 · sha256:c6a18d5c261eb74e… · /containers/cna/references/0
{"url":"https://github.com/CleverTap/clevertap-web-sdk/pull/417"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:0152b1772454e3a7fe06f97ed5ba9ea383abe65e9c77756e20332157a5f69e25 · sha256:c6a18d5c261eb74e… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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