Vulnerability-Lookup

GHSA-2P7P-3C9X-RWXM

Vulnerability from github – Published: 2026-08-07 15:33 – Updated: 2026-08-07 15:33

Details

Postiz is an open-source social media scheduling tool. The route that serves locally stored media joins URL-supplied path segments onto the upload directory and streams the file without normalising the path or confining it to that directory, and the route requires no authentication. Raw dot-segments are collapsed before routing, but URL-encoded separators survive route matching and are decoded only once they reach the handler, restoring the traversal at the filesystem call. An unauthenticated remote attacker can therefore read any file readable by the application process, including the process environment, which exposes the JWT signing secret, the database connection string, and connected provider and billing secrets. Because session tokens are signed with that secret and carry no expiry, this allows forging a non-expiring session as any user, including an administrator, without a password.

Severity

9.8 (Critical)


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

9.3 (Critical)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-19264"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-07T15:17:00Z",
    "severity": "CRITICAL"
  },
  "details": "Postiz is an open-source social media scheduling tool. The route that serves locally stored media joins URL-supplied path segments onto the upload directory and streams the file without normalising the path or confining it to that directory, and the route requires no authentication. Raw dot-segments are collapsed before routing, but URL-encoded separators survive route matching and are decoded only once they reach the handler, restoring the traversal at the filesystem call. An unauthenticated remote attacker can therefore read any file readable by the application process, including the process environment, which exposes the JWT signing secret, the database connection string, and connected provider and billing secrets. Because session tokens are signed with that secret and carry no expiry, this allows forging a non-expiring session as any user, including an administrator, without a password.",
  "id": "GHSA-2p7p-3c9x-rwxm",
  "modified": "2026-08-07T15:33:18Z",
  "published": "2026-08-07T15:33:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19264"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gitroomhq/postiz-app/commit/7936062"
    },
    {
      "type": "WEB",
      "url": "https://gadvisory.org/advisories/PSA-2026-TH12B7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/gitroomhq/postiz-app/releases/tag/v2.22.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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-2026-19264 (GCVE-0-2026-19264)

Vulnerability from cvelistv5 – Published: 2026-08-07 14:15 – Updated: 2026-08-07 17:54

Title

Unauthenticated arbitrary file read via /uploads path traversal (URL-encoded separators) leading to instance takeover

Summary

Severity

9.8 (Critical)


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

9.3 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-22

Assigner

postiz

References

3 references

URL	Tags
https://github.com/gitroomhq/postiz-app/commit/7936062	patch
https://github.com/gitroomhq/postiz-app/releases/…	release-notes
https://gadvisory.org/advisories/PSA-2026-TH12B7	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
gitroomhq	postiz-app	Affected: 0 , < 2.22.1 (semver)

Date Public

2026-08-07 14:14

Credits

KRITHIK BABU P Enno Gelhaus Nevo David

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-19264",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-07T17:54:32.053150Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-07T17:54:47.917Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageName": "postiz-app",
          "product": "postiz-app",
          "vendor": "gitroomhq",
          "versions": [
            {
              "lessThan": "2.22.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "Exploitation requires the environment variable STORAGE_PROVIDER to be set to \u0027local\u0027, which is the default value shipped in .env.example. On any other storage backend the /uploads route is rewritten to /404 and the vulnerable handler is unreachable."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "KRITHIK BABU P"
        },
        {
          "lang": "en",
          "type": "coordinator",
          "value": "Enno Gelhaus"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Nevo David"
        }
      ],
      "dateAssigned": "2026-08-07T14:13:00.000Z",
      "datePublic": "2026-08-07T14:14:58.259Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Postiz is an open-source social media scheduling tool. The route that serves locally stored media joins URL-supplied path segments onto the upload directory and streams the file without normalising the path or confining it to that directory, and the route requires no authentication. Raw dot-segments are collapsed before routing, but URL-encoded separators survive route matching and are decoded only once they reach the handler, restoring the traversal at the filesystem call. An unauthenticated remote attacker can therefore read any file readable by the application process, including the process environment, which exposes the JWT signing secret, the database connection string, and connected provider and billing secrets. Because session tokens are signed with that secret and carry no expiry, this allows forging a non-expiring session as any user, including an administrator, without a password."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        },
        {
          "cvssV4_0": {
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0"
          },
          "format": "CVSS"
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      "problemTypes": [
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          "descriptions": [
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              "cweId": "CWE-22",
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              "lang": "en",
              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2026-08-07T14:21:21.900Z",
        "orgId": "4cdc9741-f887-419a-a2fd-acbbd2729276",
        "shortName": "postiz"
      },
      "references": [
        {
          "name": "7936062",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/gitroomhq/postiz-app/commit/7936062"
        },
        {
          "name": "v2.22.1",
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/gitroomhq/postiz-app/releases/tag/v2.22.1"
        },
        {
          "name": "GAdvisory",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://gadvisory.org/advisories/PSA-2026-TH12B7"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-07-20T05:55:00.000Z",
          "value": "Postiz has received the advisory."
        },
        {
          "lang": "en",
          "time": "2026-07-20T07:44:00.000Z",
          "value": "Postiz has acknowledged and verified the advisory."
        },
        {
          "lang": "en",
          "time": "2026-07-20T12:18:00.000Z",
          "value": "Postiz has published a fix for this advisory, and verified that it works."
        },
        {
          "lang": "en",
          "time": "2026-08-07T14:13:00.000Z",
          "value": "Postiz has issued CVE-2026-19264 for this advisory."
        }
      ],
      "title": "Unauthenticated arbitrary file read via /uploads path traversal (URL-encoded separators) leading to instance takeover"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "4cdc9741-f887-419a-a2fd-acbbd2729276",
    "assignerShortName": "postiz",
    "cveId": "CVE-2026-19264",
    "datePublished": "2026-08-07T14:15:15.123Z",
    "dateReserved": "2026-08-07T14:09:09.890Z",
    "dateUpdated": "2026-08-07T17:54:47.917Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

GHSA-2P7P-3C9X-RWXM

CVE-2026-19264 (GCVE-0-2026-19264)

Tags

Sightings

Nomenclature