CVE-2026-57568Public exploitNetwork attack vectorHinoki check available

Stored XSS via unsafe Markdown description links

Published Oct 15, 2026 · Updated Oct 15, 2026

Stored XSS in Lychee before 7.6.0 allows remote authenticated users to execute JavaScript through gallery-description links. The allow_unsafe_links setting in config/markdown.php preserves javascript URIs during Markdown conversion, and gallery components insert the resulting description HTML through v-html without sanitization. Exploitation requires album-edit permissions and a visitor clicking the link, including in public albums, exposing session data accessible in the Lychee origin.

CVSS severity5.7
Medium
EPSS probability0.28%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in Lychee before 7.6.0 allows remote authenticated users to execute JavaScript through gallery-description links. The allow_unsafe_links setting in config/markdown.php preserves javascript URIs during Markdown conversion, and gallery components insert the resulting description HTML through v-html without sanitization. Exploitation requires album-edit permissions and a visitor clicking the link, including in public albums, exposing session data accessible in the Lychee origin.

The record

CVE
CVE-2026-57568
Published
Oct 15, 2026
Updated
Oct 15, 2026
Vendor
LycheeOrg
Product
Lychee
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 7.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

LycheeOrg · Lycheeversion=< 7.6.0

Published CVSS scores

5.7GitHub_MCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001Malicious Link

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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