CVE-2026-82880: yacy yacy_search_server

YaCy Search Server through 1.941 XML External Entity Injection via Parsers

CVSS 8.7 HighEPSS 0.0060 · 48th percentile

Published by the CVE Program (CNA: VulnCheck) at 31 Aug 2026, 10:51 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
yacy	yacy_search_server https://github.com/yacy/yacy_search_server pkg:github/yacy/yacy_search_server	affected 1.941 and earlier custom unaffected 3c3a307e8b7a0ebbc4d1e6b10898b52e15c0cd44 git Other versions: unaffected

Identifiers

CVE-2026-82880

CNA

VulnCheck

Weakness (CWE)

CWE-611

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.7	High	4.0	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	CNA (VulnCheck)Used for this record
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0060, the 48th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 31 Aug 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/yacy/yacy_search_server/issues/818 issue-tracking
github.com/yacy/yacy_search_server/commit/3c3a307e8b7a0ebbc4d1e6b10898b52e15c0cd44 patch
github.com/yacy/yacy_search_server/blob/Release_1.941/source/net/yacy/document/parser/images/svgParser.java#L72 technical-description
github.com/yacy/yacy_search_server/blob/Release_1.941/source/net/yacy/document/parser/mmParser.java#L66 technical-description
github.com/yacy/yacy_search_server/blob/Release_1.941/source/net/yacy/document/parser/xml/opensearchdescriptionReader.java#L119 technical-description
github.com/yacy/yacy_search_server product
www.vulncheck.com/advisories/yacy-search-server-through-1.941-xml-external-entity-injection-via-parsers third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.