Vulnerability-Lookup

CVE-2026-42568 (GCVE-0-2026-42568)

Vulnerability from cvelistv5 – Published: 2026-06-10 22:15 – Updated: 2026-06-11 16:14

Title

Yamcs Vulnerable to LDAP Injection in LdapAuthModule

Summary

Yamcs is a mission control framework. Prior to versions 5.13.0 and 5.12.7, an LDAP injection vulnerability exists in `org.yamcs.security.LdapAuthModule` when constructing search filters. The username parameter is inserted directly into the LDAP filter without proper RFC 4515 escaping. Versions 5.13.0 and 5.12.7 patch the issue.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-11 14:47 UTC

CWE

CWE-90 - Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7760 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/yamcs/yamcs/security/advisorie…	x_refsource_CONFIRM
https://github.com/yamcs/yamcs/releases/tag/yamcs…	x_refsource_MISC
https://github.com/yamcs/yamcs/releases/tag/yamcs…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
yamcs	yamcs	Affected: < 5.12.7	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-42568

Vulnerability from fkie_nvd - Published: 2026-06-10 23:16 - Updated: 2026-07-21 19:10

Severity

4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7
	security-advisories@github.com	https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0
	security-advisories@github.com	https://github.com/yamcs/yamcs/security/advisories/GHSA-cqh3-jg8p-336j

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "yamcs",
          "vendor": "yamcs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 5.12.7"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
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    {
      "lang": "en",
      "value": "Yamcs is a mission control framework. Prior to versions 5.13.0 and 5.12.7, an LDAP injection vulnerability exists in `org.yamcs.security.LdapAuthModule` when constructing search filters. The username parameter is inserted directly into the LDAP filter without proper RFC 4515 escaping. Versions 5.13.0 and 5.12.7 patch the issue."
    },
    {
      "lang": "es",
      "value": "Yamcs es un framework de control de misi\u00f3n. Antes de las versiones 5.13.0 y 5.12.7, existe una vulnerabilidad de inyecci\u00f3n LDAP en \u0027org.yamcs.security.LdapAuthModule\u0027 al construir filtros de b\u00fasqueda. El par\u00e1metro de nombre de usuario se inserta directamente en el filtro LDAP sin el escape RFC 4515 adecuado. Las versiones 5.13.0 y 5.12.7 parchean el problema."
    }
  ],
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  "lastModified": "2026-07-21T19:10:00.107",
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GHSA-CQH3-JG8P-336J

Vulnerability from github – Published: 2026-05-26 23:39 – Updated: 2026-06-11 14:05

Summary

Yamcs Vulnerable to LDAP Injection in LdapAuthModule

Details

Summary

An LDAP injection vulnerability exists in org.yamcs.security.LdapAuthModule when constructing search filters. The username parameter is inserted directly into the LDAP filter without proper RFC 4515 escaping.

Root Cause

File: yamcs-core/src/main/java/org/yamcs/security/LdapAuthModule.java:233

The username parameter is inserted directly into an LDAP search filter without RFC 4515 escaping:

// VULNERABLE
var filter = userFilter.replace("{0}", username);
var searchResult = getSingleResult(ctx, userBase, filter, controls);

LDAP wildcard characters (*, (, )) are accepted without sanitization.

Impact

With a known valid password, username=* authenticates as the first user returned by the LDAP search — enabling horizontal privilege escalation between accounts sharing similar passwords or when the attacker knows one valid password.

This affects deployments that use org.yamcs.security.LdapAuthModule in their etc/security.yaml configuration file.

Proof of Concept

curl -X POST "http://TARGET:8090/auth/token" \
  -d "grant_type=password&username=*&password=known_password"
# Returns token for first matching LDAP user

Fix

Apply RFC 4515 escaping before filter construction:

private static String escapeLdapFilter(String input) {
    return input
        .replace("\\", "\\5c")
        .replace("*",  "\\2a")
        .replace("(",  "\\28")
        .replace(")",  "\\29")
        .replace("\0", "\\00");
}
var filter = userFilter.replace("{0}", escapeLdapFilter(username));

Severity

4.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "org.yamcs:yamcs-core"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.12.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-42568"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-90"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-26T23:39:55Z",
    "nvd_published_at": "2026-06-10T23:16:46Z",
    "severity": "MODERATE"
  },
  "details": "### Summary\n\nAn LDAP injection vulnerability exists in `org.yamcs.security.LdapAuthModule` when constructing search filters. The username parameter is inserted directly into the LDAP filter without proper RFC 4515 escaping.\n\n### Root Cause\n\n**File:** `yamcs-core/src/main/java/org/yamcs/security/LdapAuthModule.java:233`\n\nThe `username` parameter is inserted directly into an LDAP search filter without RFC 4515 escaping:\n\n```java\n// VULNERABLE\nvar filter = userFilter.replace(\"{0}\", username);\nvar searchResult = getSingleResult(ctx, userBase, filter, controls);\n```\n\nLDAP wildcard characters (`*`, `(`, `)`) are accepted without sanitization.\n\n### Impact\n\nWith a known valid password, `username=*` authenticates as the first user returned by the LDAP search \u2014 enabling horizontal privilege escalation between accounts sharing similar passwords or when the attacker knows one valid password.\n\nThis affects deployments that use `org.yamcs.security.LdapAuthModule` in their `etc/security.yaml` configuration file.\n\n### Proof of Concept\n\n```bash\ncurl -X POST \"http://TARGET:8090/auth/token\" \\\n  -d \"grant_type=password\u0026username=*\u0026password=known_password\"\n# Returns token for first matching LDAP user\n```\n\n### Fix\n\nApply RFC 4515 escaping before filter construction:\n\n```java\nprivate static String escapeLdapFilter(String input) {\n    return input\n        .replace(\"\\\\\", \"\\\\5c\")\n        .replace(\"*\",  \"\\\\2a\")\n        .replace(\"(\",  \"\\\\28\")\n        .replace(\")\",  \"\\\\29\")\n        .replace(\"\\0\", \"\\\\00\");\n}\nvar filter = userFilter.replace(\"{0}\", escapeLdapFilter(username));\n```",
  "id": "GHSA-cqh3-jg8p-336j",
  "modified": "2026-06-11T14:05:22Z",
  "published": "2026-05-26T23:39:55Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/yamcs/yamcs/security/advisories/GHSA-cqh3-jg8p-336j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42568"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/yamcs/yamcs"
    },
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      "url": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7"
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    {
      "type": "WEB",
      "url": "https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Yamcs Vulnerable to LDAP Injection in LdapAuthModule"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-42568 (GCVE-0-2026-42568)

FKIE_CVE-2026-42568

GHSA-CQH3-JG8P-336J

Summary

Root Cause

Impact

Proof of Concept

Fix

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour