CVE-2026-50636: Limesurvey/limesurvey SQL Injection Vulnerability
HIGHCVE-2026-50636 is a HIGH (CVSS 8.8) sql injection vulnerability (CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')) affecting Limesurvey/limesurvey libraries in the Packagist ecosystem. The issue involves limesurvey has a sql injection issue. Remediation is available in the latest vendor maintenance releases.
CVE-2026-50636 at a Glance
Security Impact
CVSS: 8.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
How to Fix CVE-2026-50636
To remediate this vulnerability, upgrade all affected Limesurvey/limesurvey dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade limesurvey/limesurvey to Latest secure releaseRun the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for limesurvey/limesurveyHow to Check if You Are Affected
To determine whether your application is affected by CVE-2026-50636, inspect your project dependencies for Limesurvey/limesurvey:
inspect dependencies for limesurvey/limesurveyAnalyze the terminal output to locate any version of Limesurvey/limesurvey in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection'), where the product constructs all or part of an sql command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended sql command when it is sent to a downstream component. without sufficient removal or quoting of sql syntax in user-controllable inputs, the generated sql query can cause those inputs to be interpreted as sql instead of ordinary user data. In Limesurvey/limesurvey, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-50636 Affected Limesurvey/limesurvey Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
limesurvey/limesurvey
|
Packagist |
≤ 7.0.0-beta1
|
|
References
Frequently Asked Questions
What is CVE-2026-50636?
Which Limesurvey/limesurvey versions are affected?
What version fixes CVE-2026-50636?
Is limesurvey/limesurvey affected?
What is the CVSS score of CVE-2026-50636?
What CWE is associated with CVE-2026-50636?
How can I check Packagist dependencies for CVE-2026-50636?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-pr6f-87hf-hx24",
"modified" : "2026-07-31T19:24:23Z",
"published" : "2026-06-09T18:31:04Z",
"aliases" : [ "CVE-2026-50636" ],
"summary" : "LimeSurvey has a SQL Injection issue",
"details" : "The RemoteControl API methods invite_participants and remind_participants pass a caller-supplied token-ID array into TokenDynamic::findUninvited(), which concatenates the values directly into a tid IN ('...') SQL clause without parameterization or input validation. A remote, authenticated attacker holding the tokens/update permission on a survey can inject a crafted array element to perform SQL injection. Because LimeSurvey configures its PDO connection with emulated prepared statements (emulatePrepare = true) and does not disable MySQL multi-statements, the injection supports stacked queries: the attacker can append arbitrary additional statements (INSERT/UPDATE/DELETE/DROP/CREATE) after the original SELECT. This permits both arbitrary read of any data in the database, such as administrator bcrypt password hashes (lime_users), survey response PII, session records, and global settings, all recoverable via a SLEEP() time-based blind oracle, and arbitrary write/destruction of that data, including directly overwriting the administrator password hash for immediate account takeover or dropping/truncating tables. Reads and writes extend to any schema the application's database user can access. The RemoteControl interface (RPCInterface = json/xml) must be enabled, which is not the default.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
}, {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Packagist",
"name" : "limesurvey/limesurvey"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"last_affected" : "7.0.0-beta1"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-50636"
}, {
"type" : "WEB",
"url" : "https://github.com/LimeSurvey/LimeSurvey/pull/5031"
}, {
"type" : "WEB",
"url" : "https://github.com/LimeSurvey/LimeSurvey/commit/4f383aa0bbe711f0064b319edb19fba759c50a33"
}, {
"type" : "WEB",
"url" : "https://github.com/LimeSurvey/LimeSurvey/commit/98cfee55df97f9c82a72cf352bb204d51e588f7e"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/LimeSurvey/LimeSurvey"
}, {
"type" : "WEB",
"url" : "https://www.limesurvey.org"
}, {
"type" : "WEB",
"url" : "https://www.vulncheck.com/advisories/limesurvey-remotecontrol-invite-participants-remind-participants-sql-injection"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-89" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-07-31T19:24:23Z",
"nvd_published_at" : "2026-06-09T18:17:10Z"
}
}