Authenticated Server-Side Request Forgery (SSRF) via feed URL in Stringer

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55160
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-28 18:17:23 UTC
Updated2026-09-30 19:57:08 UTC
DescriptionStringer is a self-hosted, anti-social RSS reader. Prior to commit 75cb095, an unrestricted Server-Side Request Forgery (SSRF) vulnerability allows any authenticated user to force the Stringer server to send arbitrary HTTP/HTTPS requests to internal networks, localhost services, and cloud metadata endpoints (e.g. AWS IMDS 169.254.169.254). When self-service signup is enabled (Setting::UserSignup), even a low-privileged registered user can exploit this to scan internal services or steal cloud IAM credentials. This issue has been patched via commit 75cb095.

Risk And Classification

Primary CVSS: v3.1 7.6 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

EPSS: 0.002780000 probability, percentile 0.182740000 (date 2026-10-01)

Problem Types: CWE-918 | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.6HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L
3.1CNADECLARED7.6HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Stringer-rss Stringer affected < 75cb0955919a362ac49d23c8a14892d0f59ea1c4 Not specified

References

ReferenceSourceLinkTags
github.com/stringer-rss/stringer/security/advisories/GHSA-496x-437q-h35q 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/stringer-rss/stringer/pull/1548 [email protected] github.com
github.com/stringer-rss/stringer/commit/75cb0955919a362ac49d23c8a14892d0... [email protected] github.com
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