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CVE-2026-82880— YaCy Search Server through 1.941 XML External Entity Injection via Parsers

Quick assessment

Affected
yacy yacy_search_server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

YaCy Search Server 版本 1.941 及更早版本存在 XML 外部实体注入漏洞。该漏洞存在于 SVG、FreeMind 和 OpenSearch 解析器中，这些解析器未禁用外部实体解析。攻击者可以发布包含指向本地文件的 SYSTEM 实体的 DOCTYPE 声明的恶意文档，从而使爬虫将文件内容外泄到可搜索索引中。

CVSS 7.5 · High

Affected Version Matrix 2

VendorProduct Version RangeStatus
yacy yacy_search_server ≤ 1.941 affected
3c3a307e8b7a0ebbc4d1e6b10898b52e15c0cd44 unaffected
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I. Basic Information for CVE-2026-82880

Vulnerability Information
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Vulnerability Title
YaCy Search Server through 1.941 XML External Entity Injection via Parsers
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
XML外部实体引用的不恰当限制(XXE)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
yacy yacy_search_server 0 ~ 1.941 -

II. Public POCs for CVE-2026-82880

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III. Intelligence Information for CVE-2026-82880

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Patches & Fixes for CVE-2026-82880 (1)

Other References for CVE-2026-82880 (6)

IV. Related Vulnerabilities

Same product: yacy_search_server
Same vendor: yacy
Same weakness: CWE-611

V. Comments for CVE-2026-82880

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