YaCy Search Server through 1.941 contains an XML external entity injection vulnerability in SVG, FreeMind, and OpenSearch parsers that fail to disable external entity resolution. Attackers can publish malicious documents with DOCTYPE declarations containing SYSTEM entities pointing to local files, causing the crawler to exfiltrate file contents into the searchable index.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
yacy yacy_search_server unaffected
Version Status Constraints
0 affected ≤ 1.941
3c3a307e8b7a0ebbc4d1e6b10898b52e15c0cd44 unaffected —

No data.

No data.

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Vendors Products
Yacy Subscribe
Yacy Search Server Subscribe

Project Subscriptions

Vendors Products
Yacy Subscribe
Yacy Search Server Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/yacy/yacy_search_server cve-icon cve-icon
https://github.com/yacy/yacy_search_server/blob/Release_1.941/source/net/yacy/document/parser/images/svgParser.java#L72 cve-icon cve-icon
https://github.com/yacy/yacy_search_server/blob/Release_1.941/source/net/yacy/document/parser/mmParser.java#L66 cve-icon cve-icon
https://github.com/yacy/yacy_search_server/blob/Release_1.941/source/net/yacy/document/parser/xml/opensearchdescriptionReader.java#L119 cve-icon cve-icon
https://github.com/yacy/yacy_search_server/commit/3c3a307e8b7a0ebbc4d1e6b10898b52e15c0cd44 cve-icon cve-icon
https://github.com/yacy/yacy_search_server/issues/818 cve-icon cve-icon cve-icon
https://www.vulncheck.com/advisories/yacy-search-server-through-1.941-xml-external-entity-injection-via-parsers cve-icon cve-icon
History

Mon, 31 Aug 2026 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Yacy
Yacy yacy Search Server
Vendors & Products Yacy
Yacy yacy Search Server

Mon, 31 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 31 Aug 2026 11:00:00 +0000

Type Values Removed Values Added
Description YaCy Search Server through 1.941 contains an XML external entity injection vulnerability in SVG, FreeMind, and OpenSearch parsers that fail to disable external entity resolution. Attackers can publish malicious documents with DOCTYPE declarations containing SYSTEM entities pointing to local files, causing the crawler to exfiltrate file contents into the searchable index.
Title YaCy Search Server through 1.941 XML External Entity Injection via Parsers
Weaknesses CWE-611
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-31T14:18:02.368Z

Reserved: 2026-08-31T08:38:43.268Z

Link: CVE-2026-82880

cve-icon Vulnrichment

Updated: 2026-08-31T14:17:57.603Z

cve-icon NVD

Status : Deferred

Published: 2026-08-31T11:16:41.793

Modified: 2026-08-31T20:56:08.800

Link: CVE-2026-82880

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-31T21:15:05Z

Weaknesses