CVE-2026-12517Network attack vector

Unauthenticated internal metadata disclosure via unchecked fetch

Published Jul 9, 2026 · Updated Jul 9, 2026

SSRF in Stefan Bohacek Fediverse Embeds before 1.5.8 allows remote attackers to read parsed metadata from internal URLs. The unauthenticated site-info endpoint accepts a caller-controlled destination and fetches it without checking for internal or private-network addresses. A nonce exposed on public pages containing an embed satisfies the request gate, allowing anonymous access to metadata returned by reachable internal services.

CVSS severityUnavailable
Unscored
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Stefan Bohacek Fediverse Embeds before 1.5.8 allows remote attackers to read parsed metadata from internal URLs. The unauthenticated site-info endpoint accepts a caller-controlled destination and fetches it without checking for internal or private-network addresses. A nonce exposed on public pages containing an embed satisfies the request gate, allowing anonymous access to metadata returned by reachable internal services.

The record

CVE
CVE-2026-12517
Published
Jul 9, 2026
Updated
Jul 9, 2026
Vendor
Stefan Bohacek
Product
Fediverse Embeds
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 9, 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 <1.5.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Stefan Bohacek · Fediverse Embedsversion=0 <1.5.8

Published CVSS scores

No CVSS assessment is available in this record.

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.

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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 exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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