CVE-2025-59436Public exploit

SSRF bypass via octal loopback misclassification

Published Sep 16, 2025 · Updated Sep 16, 2025

SSRF in Fedor Indutny IP 2.0.1 and earlier allows attackers to reach loopback services via an octal IPv4 address. ip.isPublic treats 017700000001 as globally routable instead of decoding the 32-bit octal value as 127.0.0.1. Exposure requires a consuming application to use isPublic as an outbound-request guard and accept attacker-controlled destinations, enabling requests to localhost services.

CVSS severity3.2
Low
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Fedor Indutny IP 2.0.1 and earlier allows attackers to reach loopback services via an octal IPv4 address. ip.isPublic treats 017700000001 as globally routable instead of decoding the 32-bit octal value as 127.0.0.1. Exposure requires a consuming application to use isPublic as an outbound-request guard and accept attacker-controlled destinations, enabling requests to localhost services.

The record

CVE
CVE-2025-59436
Published
Sep 16, 2025
Updated
Sep 16, 2025
Vendor
Elliptic Project
Product
IP
Classifications
CWE-918
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2025Record 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 <=2.0.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Elliptic Project · IPversion=0 <=2.0.1

Published CVSS scores

3.2MITRECVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:L/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.

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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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)

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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