CVE-2026-18353Public exploitNetwork attack vector

Unauthenticated SSRF via OIDC issuer parser mismatch

Published Jul 30, 2026 · Updated Jul 30, 2026

SSRF in Eclipse Foundation Project Identity Authority 0.4.0 through 0.5.0 allows remote attackers to trigger arbitrary outbound requests. The SBOM upload authentication path compares an unverified JWT issuer with urlparse but fetches OIDC metadata and JWKS with parsers that interpret backslashes differently. Any remote attacker who can reach POST /v1/upload/sbom can probe internal hosts and ports through blind timing or error effects, but responses remain hidden and authentication still fails.

CVSS severity8.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Eclipse Foundation Project Identity Authority 0.4.0 through 0.5.0 allows remote attackers to trigger arbitrary outbound requests. The SBOM upload authentication path compares an unverified JWT issuer with urlparse but fetches OIDC metadata and JWKS with parsers that interpret backslashes differently. Any remote attacker who can reach POST /v1/upload/sbom can probe internal hosts and ports through blind timing or error effects, but responses remain hidden and authentication still fails.

The record

CVE
CVE-2026-18353
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
The Eclipse Foundation
Product
Project Identity Authority (PIA)
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 30, 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=0.4.0 <0.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Eclipse Foundation · Project Identity Authority (PIA)version=0.4.0 <0.6.0

Published CVSS scores

8.8Eclipse FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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