CVE-2026-82880
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 4.0
- 8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.34% probability · 27th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-611
- Source
- disclosure@vulncheck.com
References
- https://github.com/yacy/yacy_search_server
- https://github.com/yacy/yacy_search_server/blob/Release_1.941/source/net/yacy/document/parser/images/svgParser.java#L72
- https://github.com/yacy/yacy_search_server/blob/Release_1.941/source/net/yacy/document/parser/mmParser.java#L66
- https://github.com/yacy/yacy_search_server/blob/Release_1.941/source/net/yacy/document/parser/xml/opensearchdescriptionReader.java#L119
- https://github.com/yacy/yacy_search_server/commit/3c3a307e8b7a0ebbc4d1e6b10898b52e15c0cd44
- https://github.com/yacy/yacy_search_server/issues/818
- https://www.vulncheck.com/advisories/yacy-search-server-through-1.941-xml-external-entity-injection-via-parsers
- https://github.com/yacy/yacy_search_server/issues/818
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.