Policy bypass in CORS in Google Chrome prior to 126.0.6478.54 allowed a remote attacker to bypass discretionary access control via a crafted HTML page. (Chromium security severity: Medium)
CVE-2024-5840
MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence
Score 6.5 from GitHub Security Advisory published 2024-06-11. NVD baseline CVSS 6.5; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.5
- EG Score
- 6.5(medium)
- EPSS
- 33.3%
- KEV
- Not listed
Published
June 11, 2024
Last Modified
March 13, 2025
References (8)
- chrome-cve-admin@googlehttps://chromereleases.googleblog.com/2024/06/stable-channel-update-for-desktop.html
- chrome-cve-admin@googlehttps://issues.chromium.org/issues/41492103
- chrome-cve-admin@googlehttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7VXA32LXMNK3DSK3JBRLTBPFUH7LTODU/
- chrome-cve-admin@googlehttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MPU7AB53QQVNTBPGRMJRY5SXJNYWW3FX/
- af854a3a-2127-422b-91ae-364da2661108https://chromereleases.googleblog.com/2024/06/stable-channel-update-for-desktop.html
- af854a3a-2127-422b-91ae-364da2661108https://issues.chromium.org/issues/41492103
- af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7VXA32LXMNK3DSK3JBRLTBPFUH7LTODU/
- af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MPU7AB53QQVNTBPGRMJRY5SXJNYWW3FX/
Vendor Advisories for CVE-2024-5840(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Frequently asked(5)
What is CVE-2024-5840?
CVE-2024-5840 is a medium vulnerability published on June 11, 2024. Policy bypass in CORS in Google Chrome prior to 126.0.6478.54 allowed a remote attacker to bypass discretionary access control via a crafted HTML page. (Chromium security severity: Medium)
When was CVE-2024-5840 disclosed?
CVE-2024-5840 was first published in the National Vulnerability Database on June 11, 2024, with the most recent update on March 13, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-5840 actively exploited?
CVE-2024-5840 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 33.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-5840?
CVE-2024-5840 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2024-5840?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-5840, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2024-5840
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