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CVE-2026-57531

MEDIUM
5.4
CVSS 3.1
Description
Milkdown before 7.21.3 contains a DOM cross-site scripting vulnerability in the @milkdown/plugin-emoji package that allows unauthenticated attackers to execute arbitrary JavaScript in the host application's origin by causing a victim to paste attacker-controlled content. The parseDOM.getAttrs handler stores raw innerHTML of pasted span elements with data-type="emoji" without sanitization, and the toMarkdown runner subsequently assigns this unsanitized value directly to a live DOM element's innerHTML, bypassing the DOMPurify sanitization used in the toDOM path, causing payload execution on every markdown serialization cycle.

Metadata

CVE ID
CVE-2026-57531
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-06-24 15:58 UTC
Published
2026-07-24 19:10 UTC
Last updated
2026-07-25 00:59 UTC
Primary CWE
CWE-79
Improper Neutralization of Input During Web Page Generation …
Vendor / Product
Milkdown / milkdown
Sources
cve.org  ·  NVD

Severity & Metrics

5.4 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
Milkdown milkdown — 0 < 7.21.3
Weakness (CWE)
CWESourceDescription
CWE-79 cna Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVSS scores (2)
ScoreSeverityVersionSourceVector
5.4 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.1 MEDIUM 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
References (5)
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