CVE-2026-1133VulnerabilityPublished 19 Jan 2026Updated 23 Feb 2026

CVE-2026-1133: Yonyou KSOA · SQL Injection

Affects Yonyou KSOASource CVE Database V5

Not known to be exploited · CVSS 6.9 Medium.

Data as of 26 Oct 2026, 08:30 UTC

CVSS 4.0 base score

6.9Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Base metrics

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: Low
Vulnerable system integrity: Low
Vulnerable system availability: Low
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Threat metrics

Exploit Maturity: POC

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the Vulnerable System.
Vulnerable system integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact to the Vulnerable System.
Vulnerable system availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the Vulnerable System are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
Exploit Maturity: POC: Based on threat intelligence sources each of the following must apply: · Proof-of-concept is publicly available · No knowledge of reported attempts to exploit this vulnerability · No knowledge of publicly available solutions used to simplify attempts to exploit the vulnerability

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 19 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
YonyouKSOA	Affected =9.0	Fixed in–
Mavencom.yonyou/ksoa`pkg:maven/com.yonyou/ksoa`Other threats	Affected =9.0	Fixed in–

CPE configurations (1)

cpe:2.3:a:yonyou:ksoa:*:*:*:*:*:*:*:*

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AI-suggested

Given the absence of an official patch from Yonyou, organizations should implement immediate compensating controls. First, apply strict input validation and sanitization on the folderid parameter at the web application firewall (WAF) or reverse proxy level to block malicious SQL injection payloads. Deploy WAF rules specifically tailored to detect and prevent SQL injection attempts targeting /kmf/folder.jsp requests. Limit network exposure of the KSOA application by restricting access to trusted IP addresses and segments through firewall policies. Conduct thorough logging and monitoring of web server and database activity to identify anomalous queries or repeated access attempts to the vulnerable endpoint. Employ database-level permissions to minimize the impact of any successful injection by restricting the application's database user privileges to the least necessary. Consider deploying runtime application self-protection (RASP) solutions if available. Additionally, organizations should engage with Yonyou support channels to demand timely patch releases and track any updates. Regular security assessments and penetration testing focusing on this vulnerability can help verify the effectiveness of mitigations.

Description

A vulnerability was determined in Yonyou KSOA 9.0. The impacted element is an unknown function of the file /kmf/folder.jsp of the component HTTP GET Parameter Handler. Executing a manipulation of the argument folderid can lead to sql injection. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

The impact of CVE-2026-1133 on organizations worldwide includes potential unauthorized access to sensitive database information, data tampering, and disruption of service availability within affected Yonyou KSOA 9.0 deployments. Since the vulnerability allows remote exploitation without authentication, attackers can leverage it to extract confidential data or corrupt business-critical information, undermining data integrity and confidentiality. The partial availability impact could result in denial or degradation of service, affecting business continuity. Organizations relying on Yonyou KSOA for enterprise resource planning or other critical functions may face operational disruptions and reputational damage. The absence of a vendor patch increases the window of exposure, raising the likelihood of exploitation attempts. Furthermore, attackers could use this vulnerability as a foothold for lateral movement within networks, escalating risks to broader IT infrastructure. The medium severity rating suggests a significant but not catastrophic impact, yet the ease of exploitation and lack of authentication requirements elevate the threat level for affected entities.

Summary

CVE-2026-1133 is a SQL injection vulnerability identified in Yonyou KSOA version 9.0, specifically within the /kmf/folder.jsp component that processes the HTTP GET parameter folderid. This vulnerability arises from improper sanitization or validation of the folderid parameter, allowing an attacker to inject malicious SQL code into backend database queries. The injection flaw can be exploited remotely without requiring authentication or user interaction, making it accessible to unauthenticated attackers over the network. Successful exploitation can lead to unauthorized access to sensitive data, modification or deletion of database records, and potential disruption of service, although the impact is assessed as limited in scope (partial confidentiality, integrity, and availability). The vulnerability has a CVSS 4.0 base score of 6.9, reflecting medium severity with network attack vector, low attack complexity, and no privileges or user interaction needed. Despite early notification, the vendor Yonyou has not issued a patch or official response, and public exploit information is available, increasing the risk of exploitation. The lack of vendor remediation necessitates that organizations using KSOA 9.0 implement alternative mitigations to reduce exposure. This vulnerability is particularly concerning for enterprises relying on Yonyou's KSOA platform for business operations, as it could be leveraged to compromise critical backend systems and data integrity.

References

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