CVE-2026-82880Public exploitNetwork attack vectorHinoki check available

Local-file disclosure via unsafe SAX parser configuration

Published Aug 31, 2026 · Updated Aug 31, 2026

XML external entity injection in YaCy Search Server 1.941 and earlier allows remote attackers to disclose local files through crawled XML. The svgParser, mmParser, and opensearchdescriptionReader classes create SAX parsers without disabling DOCTYPE or external entity resolution. Exploitation requires the crawler to fetch an attacker-published SVG, FreeMind, or OpenSearch document; resolved file contents enter the searchable index.

CVSS severity8.7
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

XML external entity injection in YaCy Search Server 1.941 and earlier allows remote attackers to disclose local files through crawled XML. The svgParser, mmParser, and opensearchdescriptionReader classes create SAX parsers without disabling DOCTYPE or external entity resolution. Exploitation requires the crawler to fetch an attacker-published SVG, FreeMind, or OpenSearch document; resolved file contents enter the searchable index.

The record

CVE
CVE-2026-82880
Published
Aug 31, 2026
Updated
Aug 31, 2026
Vendor
YaCy
Product
YaCy
Classifications
CWE-611, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=1.941

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

YaCy · YaCyversion=0 <=1.941

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
7.5VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-611Improper Restriction of XML External Entity Reference
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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