CVE-2026-85662Public exploitNetwork attack vector

Unauthenticated internal network access via media URL fetching

Published Sep 4, 2026 · Updated Sep 8, 2026

Server-side request forgery in Marqo 2.26.0 allows remote attackers to reach internal services through crafted media field URLs. Within add_documents, download_image_from_url follows redirects with pycurl and fetch_content_sample passes the raw URL to requests.get; neither path filters destination hosts or private, loopback, link-local, or reserved addresses. Because the API binds to all interfaces without authentication by default, a reachable instance exposes a blind reachability oracle and pivot to internal services or cloud metadata.

CVSS severity6.9
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Marqo 2.26.0 allows remote attackers to reach internal services through crafted media field URLs. Within add_documents, download_image_from_url follows redirects with pycurl and fetch_content_sample passes the raw URL to requests.get; neither path filters destination hosts or private, loopback, link-local, or reserved addresses. Because the API binds to all interfaces without authentication by default, a reachable instance exposes a blind reachability oracle and pivot to internal services or cloud metadata.

The record

CVE
CVE-2026-85662
Published
Sep 4, 2026
Updated
Sep 8, 2026
Vendor
Marqo
Product
Marqo
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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 <=2.26.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Marqo · Marqoversion=0 <=2.26.0

Published CVSS scores

5.3VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
6.9VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA: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-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

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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