CVE-2026-82880

YaCy Search Server through 1.941 XML External Entity Injection via Parsers

Assigner: VulnCheck
Reserved: 31.08.2026 Published: 31.08.2026 Updated: 31.08.2026

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.

Metrics

CVSS 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
CVSS Score: 8.7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	yacy
Product	yacy_search_server
Versions	Default: unaffected affected from 0 to 1.941 (incl.) Version 3c3a307e8b7a0ebbc4d1e6b10898b52e15c0cd44 is unaffected

Vendor

yacy

Product

yacy_search_server

Versions

Default: unaffected

affected from 0 to 1.941 (incl.)
Version 3c3a307e8b7a0ebbc4d1e6b10898b52e15c0cd44 is unaffected

Credits

Yu Sun finder

References

Problem Types