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CVE-2026-40201

@diplodoc/search-extension allows stored XSS via Markdown file title

5.4 MediumFix available

@diplodoc/search-extension 1.0.0 through 3.x before 3.0.3 allows stored XSS via the title in a .md file.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
Required

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

0.24%Up 0.2 points since May 1, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.4

@diplodoc/search-extension 1.0.0 through 3.x before 3.0.3 allows stored XSS via the title in a .md file.

Record
CVE-2026-40201
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
EUVDEUVD-2026-26484 5.4

@diplodoc/search-extension 1.0.0 through 3.x before 3.0.3 allows stored XSS via the title in a .md file.

Record
EUVD-2026-26484
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-rjmp-rwj4-mv82 5.4

@diplodoc/search-extension allows stored XSS via Markdown file title

@diplodoc/search-extension 1.0.0 through 3.0.2 allows stored XSS via .md file title.

Record
GHSA-rjmp-rwj4-mv82
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
NVD 5.4

@diplodoc/search-extension 1.0.0 through 3.x before 3.0.3 allows stored XSS via the title in a .md file.

Record
CVE-2026-40201
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSV 5.4

@diplodoc/search-extension 1.0.0 through 3.x before 3.0.3 allows stored XSS via the title in a .md file.

Record
CVE-2026-40201
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSVGHSA-rjmp-rwj4-mv82 5.4

@diplodoc/search-extension allows stored XSS via Markdown file title

@diplodoc/search-extension 1.0.0 through 3.0.2 allows stored XSS via .md file title.

Record
GHSA-rjmp-rwj4-mv82
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
@diplodoc/search-extension
npm
 1.0.0 up to 3.0.5
3.0.5

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-40201 is a medium vulnerability (CVSS 5.4) in Diplodoc-platform @diplodoc/search-extension, published May 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.24%, the 15th percentile. Fixed in @diplodoc/search-extension 3.0.5.

References

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