{"answers":{"affected":"2 open source packages ship an affected version, including clevertap-web-sdk. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26862 exists.","fix":"Upgrade clevertap-web-sdk to 1.15.3 or later.","what":"CVE-2026-26862 is a high-severity cross-site scripting vulnerability in n/a, published on 27 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-26862 and fix it if it is affected.\n\nWhat it is: CVE-2026-26862 is a high-severity cross-site scripting vulnerability in n/a, published on 27 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26862 exists.\n\nAffected packages and fixed versions:\n- clevertap-web-sdk (npm): affected all versions; fixed in 1.15.3\n- clevertap-web-sdk (npm): affected all versions; fixed in 1.15.3\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-26862/ (Markdown: https://insights.sbomify.com/CVE-2026-26862/index.md)","id":"CVE-2026-26862","markdown":"https://insights.sbomify.com/CVE-2026-26862/index.md","name":"CVE-2026-26862","record":{"aliases":["GHSA-jfrq-hj9f-c8qx"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"CleverTap Web SDK","requires_auth":"none","summary":"Attackers can execute arbitrary JavaScript in user browsers via DOM-based XSS in the CleverTap Web SDK Visual Builder module due to weak origin validation.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"clevertap_web_sdk","vendor":"clevertap"}],"cvss":{"score":8.3,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-829","name":"Inclusion of Functionality from Untrusted Control Sphere"},{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"CleverTap Web SDK version 1.15.2 and earlier is vulnerable to DOM-based Cross-Site Scripting (XSS) via window.postMessage in the Visual Builder module. The origin validation in src/modules/visualBuilder/pageBuilder.js (lines 56-60) uses the includes() method to verify the originUrl contains \"dashboard.clevertap.com\", which can be bypassed by an attacker using a crafted subdomain","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"CleverTap Web SDK is vulnerable to DOM-based Cross-Site Scripting (XSS) via window.postMessage","id":"CVE-2026-26862","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"SQL injection in n/a","id":"CVE-2026-26883"},"packages":[{"ecosystem":"npm","fixed":["1.15.3"],"introduced":["0"],"last_affected":[],"package":"clevertap-web-sdk","purl":null,"source":"GHSA-jfrq-hj9f-c8qx"},{"ecosystem":"npm","fixed":["1.15.3"],"introduced":["0"],"last_affected":[],"package":"clevertap-web-sdk","purl":"pkg:npm/clevertap-web-sdk","source":"GHSA-jfrq-hj9f-c8qx"}],"prev":{"headline":"CleverTap Web SDK is vulnerable to DOM-based XSS via handleCustomHtmlPreviewPostMessageEvent function","id":"CVE-2026-26861"},"products":["n/a"],"published":"2026-02-27","related":[{"cvss_score":8.3,"headline":"CleverTap Web SDK is vulnerable to DOM-based XSS via handleCustomHtmlPreviewPostMessageEvent function","id":"CVE-2026-26861","kev_date_added":null,"published":"2026-02-27"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-02-27","vendors":["n/a"]},"summary":"Attackers can execute arbitrary JavaScript in user browsers via DOM-based XSS in the CleverTap Web SDK Visual Builder module due to weak origin validation.","url":"https://insights.sbomify.com/CVE-2026-26862/"}