CVE-2026-55160Public exploitNetwork attack vector

Authenticated internal network probing via unvalidated feed fetches

Published Sep 28, 2026 · Updated Sep 28, 2026

SSRF in stringer-rss Stringer before commit 75cb0955 allows remote authenticated users to probe internal services via feed URLs. FeedDiscovery passes user-supplied URLs to HTTParty and Feedbag without restricting destinations, and outbound requests follow redirects. Any authenticated account can trigger the fetch; when self-service signup is enabled, a registered user can infer internal host and port availability from response timing.

CVSS severity7.6
High
EPSS probability0.28%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in stringer-rss Stringer before commit 75cb0955 allows remote authenticated users to probe internal services via feed URLs. FeedDiscovery passes user-supplied URLs to HTTParty and Feedbag without restricting destinations, and outbound requests follow redirects. Any authenticated account can trigger the fetch; when self-service signup is enabled, a registered user can infer internal host and port availability from response timing.

The record

CVE
CVE-2026-55160
Published
Sep 28, 2026
Updated
Sep 28, 2026
Vendor
stringer-rss
Product
Stringer
Classifications
CWE-918, T1046
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 28, 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=< 75cb0955919a362ac49d23c8a14892d0f59ea1c4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

stringer-rss · Stringerversion=< 75cb0955919a362ac49d23c8a14892d0f59ea1c4

Published CVSS scores

7.6stringer-rssCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1046Network Service Discovery

Public exploit references

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Technologies

Your stack

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Your stack

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