Vulnerability-Lookup

GHSA-6CJ6-2FG2-2R4G

Vulnerability from github – Published: 2026-06-16 15:33 – Updated: 2026-06-16 15:33

Details

The issue lies in the fact that the application does not invalidate the pre-authentication cookie or generate a new identifier for the authenticated context. As a result, if an attacker manages to set a known session identifier in the victim’s browser, they will be able to maintain unauthorised access to the account once the victim has authenticated.

Severity

5.1 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-9507"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-38"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-16T13:16:38Z",
    "severity": "MODERATE"
  },
  "details": "A session fixation vulnerability has been identified in osTicket v1.18.2. This security flaw allows an attacker to hijack a victim\u2019s account by keeping the initial session identifier (OSTSESSID) active after a successful login.\n\n\n\nThe issue lies in the fact that the application does not invalidate the pre-authentication cookie or generate a new identifier for the authenticated context. As a result, if an attacker manages to set a known session identifier in the victim\u2019s browser, they will be able to maintain unauthorised access to the account once the victim has authenticated.",
  "id": "GHSA-6cj6-2fg2-2r4g",
  "modified": "2026-06-16T15:33:50Z",
  "published": "2026-06-16T15:33:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9507"
    },
    {
      "type": "WEB",
      "url": "https://www.incibe.es/en/incibe-cert/notices/aviso/session-fixation-vulnerability-enhancesofts-osticket"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-9507 (GCVE-0-2026-9507)

Vulnerability from cvelistv5 – Published: 2026-06-16 11:47 – Updated: 2026-06-16 16:18

Title

Session fixation vulnerability in Enhancesoft's osTicket

Summary

A session fixation vulnerability has been identified in osTicket v1.18.2. This security flaw allows an attacker to hijack a victim’s account by keeping the initial session identifier (OSTSESSID) active after a successful login. The issue lies in the fact that the application does not invalidate the pre-authentication cookie or generate a new identifier for the authenticated context. As a result, if an attacker manages to set a known session identifier in the victim’s browser, they will be able to maintain unauthorised access to the account once the victim has authenticated.

Severity

5.1 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-16 16:18 UTC

CWE

CWE-38 - Path traversal: '\absolute\pathname\here'

Assigner

INCIBE INCIBE root Scorecard

References

1 reference

URL	Tags
https://www.incibe.es/en/incibe-cert/notices/avis…	patch

Impacted products

1 product

Vendor	Product	Version
Enhancesoft	osTicket	Affected: 1.18.2

Date Public

2026-06-16 11:44

Credits

Mario Valiente

Show details on NVD website

JSON

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  "containers": {
    "adp": [
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-9507",
                "options": [
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                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-16T16:18:00.355878Z",
                "version": "2.0.3"
              },
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          "dateUpdated": "2026-06-16T16:18:10.713Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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          "type": "finder",
          "value": "Mario Valiente"
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      "metrics": [
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            "Recovery": "NOT_DEFINED",
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            "attackVector": "NETWORK",
            "baseScore": 5.1,
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            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
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      "providerMetadata": {
        "dateUpdated": "2026-06-16T11:50:42.928Z",
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      "references": [
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          "tags": [
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          "url": "https://www.incibe.es/en/incibe-cert/notices/aviso/session-fixation-vulnerability-enhancesofts-osticket"
        }
      ],
      "solutions": [
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          "supportingMedia": [
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              "base64": false,
              "type": "text/html",
              "value": "The current (legacy) source code is in maintenance mode, whilst Enhancesoft is focusing on a complete rewrite of the code (v2.0). This means that release cycles and security updates for the legacy code have been significantly delayed."
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          ],
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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.

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.
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GHSA-6CJ6-2FG2-2R4G

CVE-2026-9507 (GCVE-0-2026-9507)

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