CVE-2026-111622Proof of concept (PoC) published · CISA

smart-sso through 2.1.1 OAuth2 Authorization Code Theft via Unvalidated redirectUri

CVSS score

7.6

EPSS probability

%0.4

Risk score

0.0

Published

1 d ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

CVE AI research

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DayBreach AI Explanation

Verified against sources

smart-sso through 2.1.1 OAuth2 Authorization Code Theft via Unvalidated redirectUri

Sources read

Source agreement

0/2

Evidence confidence

%39

Short explanation

smart-sso through 2.1.1 contains an open redirect vulnerability in the /login handler due to an unvalidated redirectUri parameter. Unauthenticated attackers can send crafted links to users with active SSO sessions to steal OAuth2 authorization codes and obtain victims access tokens.

Why does it matter?

This vulnerability allows attackers to compromise victims OAuth2 authorization codes and obtain access tokens using valid client credentials. Sources conflict regarding the CVSS base score and severity rating.

What should be done?

Follow vendor advisories and updates
Implement input validation mechanisms for the redirectUri parameter

Note on uncertainty

3 alanda kaynak uyuşmazlığı var. DayBreach bu değerleri saklamadı; kaynak karşılaştırması aşağıda gösteriliyor.

Chain of evidence and sources3 verified claims

smart-sso 2.1.1 ve öncesi sürümler, /login işleyicisindeki açık yönlendirme zafiyeti barındırmaktadır.

S0 · daybreach-canonical S1 · cvelist S2 · nvd

Saldırganlar doğrulanmamış redirectUri parametresi ile OAuth2 yetkilendirme kodlarını çalabilmektedir.

S0 · daybreach-canonical S1 · cvelist S2 · nvd

İncelenen resmî kaynaklarda yama durumu doğrulanamamıştır.

S0 · daybreach-canonical

Show the technical text from the sources

smart-sso through 2.1.1 contains an open redirect vulnerability in the /login handler that allows unauthenticated attackers to steal OAuth2 authorization codes by supplying an unvalidated redirectUri parameter. Attackers can send crafted /login links to users with active SSO sessions, then redeem stolen codes at /oauth2/access_token with any valid client credentials to obtain victims' access tokens.

CVSS vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

CWE: CWE-601

Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-111622 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	a466350665	smart-sso	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
7.6	CVSS V40	HIGH	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X	NVD
7.6	CVSS V4_0	HIGH	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	CVE CNA
6.8	CVSS V31	MEDIUM	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N	NVD
6.8	CVSS V3_1	MEDIUM	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N	CVE CNA

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-111622 is associated with the following CWEs:

CWE-601: Common Weakness Enumeration Entry CWE-601

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-111622 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsGerekmiyor

User—

Official Sources and Advisories

https://hackmd.io/@hieuPenguinnn/smart-sso-oauth2-code-leak-open-redirectvendor-advisory https://github.com/a466350665/smart-sso/blob/2.1.1/smart-sso-server/src/main/java/com/smart/sso/server/controller/LoginController.java#L53-L63vendor-advisory https://github.com/a466350665/smart-sso/blob/1.6.0/smart-sso-server/src/main/java/openjoe/smart/sso/server/controller/LoginController.java#L50-L59vendor-advisory https://github.com/a466350665/smart-sso/blob/1.6.0/smart-sso-server/src/main/java/openjoe/smart/sso/server/controller/Oauth2Controller.java#L55-L84vendor-advisory https://github.com/a466350665/smart-ssovendor-advisory VulnCheck Advisory: smart-sso through 2.1.1 OAuth2 Authorization Code Theft via Unvalidated redirectUrivendor-advisory

CVSS Vector Radar Chart

7.6 / 10

Vulnerability Scoring Details

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone required

User InteractionP

Confidentiality (Gizlilik)High

Integrity (Bütünlük)P

Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

a466350665

Weakness Type (CWE & CAPEC)

CWE-601

Get this vulnerability through the API

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smart-sso through 2.1.1 OAuth2 Authorization Code Theft via Unvalidated redirectUri

Impact on My Inventory

Vulnerability description

DayBreach AI Explanation

Short explanation

What should be done?

IMPACT: Affected Products and Software

Affected Products

RED HAT CSAF/VEX: Product Impact Check

SCORING: CVSS from Multiple Sources

CVSS Scores

Patch and Remediation Guide

Solution & Remediation Advisory

Public exploit and active exploitation status

Verified exploit intelligence

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

Common Attack Pattern Enumeration and Classification (CAPEC)

Attack Vector and Accessibility

Official Sources and Advisories

CVSS Vector Radar Chart

Vulnerability Scoring Details

Weakness Type (CWE & CAPEC)

Get this vulnerability through the API

DayBreach

Glossary & Reference

Directories & Feeds

RSS & Integration