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NVD / CVE Program· CNA Chrome

CVE-2024-5840: 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

Noroxi assessment

Priority: Monitor (action score 26/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.41% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: chromium (Debian:12) 126.0.6478.56-1~deb12u1; chromium (Debian:13) 126.0.6478.56-1; chromium (openSUSE:Leap 15.5) 126.0.6478.126-bp156.2.6.1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to chromium (Debian:12) 126.0.6478.56-1~deb12u1; chromium (Debian:13) 126.0.6478.56-1; chromium (openSUSE:Leap 15.5) 126.0.6478.126-bp156.2.6.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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)

MediumCVSS 6.5 · v3.1—No exploit Fix available
Published
Jun 11, 2024
Updated
Jun 17, 2026
EPSS
0.4% · 35th percentile

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-5840

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
googlechrome
fedoraprojectfedora

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • fedoraproject fedora39
  • fedoraproject fedora40
  • google chromebefore 126.0.6478.54

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Chrome). Independent of NVD's CPE analysis and usually ahead of it.

  • Google Chrome

    • 126.0.6478.54 and later · before 126.0.6478.54affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12chromiumbefore 126.0.6478.56-1~deb12u1126.0.6478.56-1~deb12u1
Debian:13chromiumbefore 126.0.6478.56-1126.0.6478.56-1
openSUSE:Leap 15.5chromiumbefore 126.0.6478.126-bp156.2.6.1126.0.6478.126-bp156.2.6.1
openSUSE:Leap 15.5 NonFreeoperabefore 112.0.5197.25-lp155.3.54.1112.0.5197.25-lp155.3.54.1
openSUSE:Leap 15.6 NonFreeoperabefore 112.0.5197.25-lp156.2.11.1112.0.5197.25-lp156.2.11.1
openSUSE:Tumbleweedchromiumbefore 126.0.6478.126-1.1126.0.6478.126-1.1
SUSE:Package Hub 15 SP5chromiumbefore 126.0.6478.126-bp156.2.6.1126.0.6478.126-bp156.2.6.1

Same product

google: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-4863Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of boKEV
    95Now
  • CVE-2021-21224Type confusion in V8 in Google Chrome prior to 90.0.4430.85 allowed a remote attacker to execute arbitrary code inside a sandbox via a craftKEV
    90Now
  • CVE-2018-17463Incorrect side effect annotation in V8 in Google Chrome prior to 70.0.3538.64 allowed a remote attacker to execute arbitrary code inside a sKEV
    90Now

Published before and after this one in the same product

  • ← EarlierCVE-2024-5838Jun 11, 2024 · Type Confusion in V8 in Google Chrome prior to 126.0.6478.54 allowed a remote attacker to perform out of bounds memory access via a crafted
    35Monitor
  • ← EarlierCVE-2024-5839Jun 11, 2024 · Inappropriate Implementation in Memory Allocator in Google Chrome prior to 126.0.6478.54 allowed a remote attacker to potentially exploit he
    26Monitor
  • Later →CVE-2024-5841Jun 11, 2024 · Use after free in V8 in Google Chrome prior to 126.0.6478.54 allowed a remote attacker to potentially exploit heap corruption via a crafted
    36Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:chromium126.0.6478.56-1~deb12u1 · Debian:12Package registry (OSV)
opensuse:chromium126.0.6478.126-bp156.2.6.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:opera112.0.5197.25-lp155.3.54.1 · openSUSE:Leap 15.5 NonFreePackage registry (OSV)
suse:chromium126.0.6478.126-bp156.2.6.1 · SUSE:Package Hub 15 SP5Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2024-1675111 days apartInsufficient policy enforcement in Download in Google Chrome prior to 122.0.6261.57 allowed a remote attacker to bypass filesystem restricti
    38Monitor
  • CVE-2025-10201456 days apartInappropriate implementation in Mojo in Google Chrome on Android, Linux, ChromeOS prior to 140.0.7339.127 allowed a remote attacker to bypas
    35Monitor
  • CVE-2023-2940378 days apartInappropriate implementation in Downloads in Google Chrome prior to 114.0.5735.90 allowed an attacker who convinced a user to install a mali
    26Monitor
  • CVE-2025-4051328 days apartInsufficient data validation in DevTools in Google Chrome prior to 136.0.7103.59 allowed a remote attacker who convinced a user to engage in
    25Monitor
  • CVE-2024-0810140 days apartInsufficient policy enforcement in DevTools in Google Chrome prior to 121.0.6167.85 allowed an attacker who convinced a user to install a ma
    17Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-284 · Improper Access Control

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records