Vulnerability-Lookup

CVE-2026-31817 (GCVE-0-2026-31817)

Vulnerability from cvelistv5 – Published: 2026-03-10 21:08 – Updated: 2026-03-11 15:19

Title

OliveTin's unsafe parsing of UniqueTrackingId can be used to write files

Summary

OliveTin gives access to predefined shell commands from a web interface. Prior to 3000.11.2, when the saveLogs feature is enabled, OliveTin persists execution log entries to disk. The filename used for these log files is constructed in part from the user-supplied UniqueTrackingId field in the StartAction API request. This value is not validated or sanitized before being used in a file path, allowing an attacker to use directory traversal sequences (e.g., ../../../) to write files to arbitrary locations on the filesystem. This vulnerability is fixed in 3000.11.2.

Severity ?

8.5 (High)


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

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M

References

URL

Tags

https://github.com/OliveTin/OliveTin/security/adv…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	OliveTin	OliveTin	Affected: < 3000.11.2

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-31817

Vulnerability from fkie_nvd - Published: 2026-03-10 22:16 - Updated: 2026-03-12 18:12

Severity ?

8.5 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/OliveTin/OliveTin/security/advisories/GHSA-364q-w7vh-vhpc	Exploit, Mitigation, Vendor Advisory

Impacted products

	Vendor	Product	Version
	olivetin	olivetin	*

JSON

To clipboard

{
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      "nodes": [
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          "cpeMatch": [
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              "criteria": "cpe:2.3:a:olivetin:olivetin:*:*:*:*:*:*:*:*",
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    },
    {
      "lang": "es",
      "value": "OliveTin da acceso a comandos shell predefinidos desde una interfaz web. Antes de la versi\u00f3n 3000.11.2, cuando la funci\u00f3n saveLogs est\u00e1 habilitada, OliveTin persiste las entradas del registro de ejecuci\u00f3n en el disco. El nombre de archivo utilizado para estos archivos de registro se construye en parte a partir del campo UniqueTrackingId proporcionado por el usuario en la solicitud de la API StartAction. Este valor no se valida ni se sanea antes de ser utilizado en una ruta de archivo, lo que permite a un atacante utilizar secuencias de salto de directorio (por ejemplo, ../../../) para escribir archivos en ubicaciones arbitrarias del sistema de archivos. Esta vulnerabilidad se corrige en la versi\u00f3n 3000.11.2."
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GHSA-364Q-W7VH-VHPC

Vulnerability from github – Published: 2026-03-11 00:09 – Updated: 2026-03-11 05:46

Summary

OliveTin's unsafe parsing of UniqueTrackingId can be used to write files

Details

When the saveLogs feature is enabled, OliveTin persists execution log entries to disk. The filename used for these log files is constructed in part from the user-supplied UniqueTrackingId field in the StartAction API request. This value is not validated or sanitized before being used in a file path, allowing an attacker to use directory traversal sequences (e.g., ../../../) to write files to arbitrary locations on the filesystem.

Affected Code

Entry point — service/internal/api/api.go (line 130):

The UniqueTrackingId from the API request is passed directly to the executor without validation:

execReq := executor.ExecutionRequest{
    Binding:    pair,
    TrackingID: req.Msg.UniqueTrackingId, // user-controlled, no validation
    // ...
}

Tracking ID accepted as-is — service/internal/executor/executor.go (lines 508–512):

The tracking ID is only replaced with a UUID if it is empty or a duplicate. Any other string, including one containing path separators, is accepted:

_, isDuplicate := e.GetLog(req.TrackingID)

if isDuplicate || req.TrackingID == "" {
    req.TrackingID = uuid.NewString()
}

Filename construction — service/internal/executor/executor.go (line 1042):

The tracking ID is interpolated directly into the log filename:

filename := fmt.Sprintf("%v.%v.%v",
    req.logEntry.ActionTitle,
    req.logEntry.DatetimeStarted.Unix(),
    req.logEntry.ExecutionTrackingID,
)

File write — service/internal/executor/executor.go (lines 1068–1069 and 1082–1083):

The filename is joined to the configured log directory using path.Join, which calls path.Clean internally. path.Clean resolves .. path segments, causing the final file path to escape the intended directory:

// Results file (.yaml)
filepath := path.Join(dir, filename+".yaml")
err = os.WriteFile(filepath, data, 0600)

// Output file (.log)
filepath := path.Join(dir, filename+".log")
err := os.WriteFile(filepath, []byte(data), 0600)

Proof of Concept

An attacker sends the following StartAction request (Connect RPC or REST):

{
  "bindingId": "<any-executable-action-id>",
  "uniqueTrackingId": "../../../tmp/pwned"
}

Assuming the action title is Ping the Internet and the timestamp is 1741320000, the constructed filename becomes:

Ping the Internet.1741320000.../../../tmp/pwned

When path.Join processes this with a configured results directory like /var/olivetin/logs:

path.Join("/var/olivetin/logs", "Ping the Internet.1741320000.../../../tmp/pwned.yaml")

path.Clean resolves the traversal:

Path segments: ["var", "olivetin", "logs", "Ping the Internet.1741320000...", "..", "..", "..", "tmp", "pwned.yaml"]
The .. segments traverse upward past the log directory.
Final resolved path: /tmp/pwned.yaml

Two files are written:

.yaml file — contains YAML-serialized InternalLogEntry (action title, icon, timestamps, exit code, output, tags, username, tracking ID)
.log file — contains the raw command output (potentially attacker-influenced if the action echoes its arguments)

Impact

Arbitrary file write to any path writable by the OliveTin process.
OliveTin frequently runs as root inside Docker containers, so the writable scope is often the entire filesystem.
An attacker could:
Overwrite OliveTin's own sessions.yaml to inject authenticated sessions.
Write to entity file directories to inject malicious entity data.
Write to system cron directories or other locations to achieve remote code execution.
Cause denial of service by overwriting critical system files.

Suggested Fix

Validate the UniqueTrackingId to ensure it only contains safe characters before use. A strict UUID format check is the simplest approach:

import "regexp"

var validTrackingID = regexp.MustCompile(`^[a-fA-F0-9\-]+$`)

// In ExecRequest, before accepting the user-supplied ID:
if req.TrackingID == "" || !validTrackingID.MatchString(req.TrackingID) {
    req.TrackingID = uuid.NewString()
}

Alternatively, sanitize the filename in stepSaveLog by stripping or rejecting path separators and .. sequences.

Severity ?

8.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/OliveTin/OliveTin"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.0-20260309102040-b03af0e2eca3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-31817"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-11T00:09:41Z",
    "nvd_published_at": "2026-03-10T22:16:19Z",
    "severity": "HIGH"
  },
  "details": "When the `saveLogs` feature is enabled, OliveTin persists execution log entries to disk. The filename used for these log files is constructed in part from the user-supplied `UniqueTrackingId` field in the `StartAction` API request. This value is not validated or sanitized before being used in a file path, allowing an attacker to use directory traversal sequences (e.g., `../../../`) to write files to arbitrary locations on the filesystem.\n### Affected Code\n\n**Entry point \u2014 `service/internal/api/api.go` (line 130):**\n\nThe `UniqueTrackingId` from the API request is passed directly to the executor without validation:\n\n```go\nexecReq := executor.ExecutionRequest{\n    Binding:    pair,\n    TrackingID: req.Msg.UniqueTrackingId, // user-controlled, no validation\n    // ...\n}\n```\n\n**Tracking ID accepted as-is \u2014 `service/internal/executor/executor.go` (lines 508\u2013512):**\n\nThe tracking ID is only replaced with a UUID if it is empty or a duplicate. Any other string, including one containing path separators, is accepted:\n\n```go\n_, isDuplicate := e.GetLog(req.TrackingID)\n\nif isDuplicate || req.TrackingID == \"\" {\n    req.TrackingID = uuid.NewString()\n}\n```\n\n**Filename construction \u2014 `service/internal/executor/executor.go` (line 1042):**\n\nThe tracking ID is interpolated directly into the log filename:\n\n```go\nfilename := fmt.Sprintf(\"%v.%v.%v\",\n    req.logEntry.ActionTitle,\n    req.logEntry.DatetimeStarted.Unix(),\n    req.logEntry.ExecutionTrackingID,\n)\n```\n\n**File write \u2014 `service/internal/executor/executor.go` (lines 1068\u20131069 and 1082\u20131083):**\n\nThe filename is joined to the configured log directory using `path.Join`, which calls `path.Clean` internally. `path.Clean` resolves `..` path segments, causing the final file path to escape the intended directory:\n\n```go\n// Results file (.yaml)\nfilepath := path.Join(dir, filename+\".yaml\")\nerr = os.WriteFile(filepath, data, 0600)\n\n// Output file (.log)\nfilepath := path.Join(dir, filename+\".log\")\nerr := os.WriteFile(filepath, []byte(data), 0600)\n```\n\n### Proof of Concept\n\nAn attacker sends the following `StartAction` request (Connect RPC or REST):\n\n```json\n{\n  \"bindingId\": \"\u003cany-executable-action-id\u003e\",\n  \"uniqueTrackingId\": \"../../../tmp/pwned\"\n}\n```\n\nAssuming the action title is `Ping the Internet` and the timestamp is `1741320000`, the constructed filename becomes:\n\n```\nPing the Internet.1741320000.../../../tmp/pwned\n```\n\nWhen `path.Join` processes this with a configured results directory like `/var/olivetin/logs`:\n\n```\npath.Join(\"/var/olivetin/logs\", \"Ping the Internet.1741320000.../../../tmp/pwned.yaml\")\n```\n\n`path.Clean` resolves the traversal:\n\n1. Path segments: `[\"var\", \"olivetin\", \"logs\", \"Ping the Internet.1741320000...\", \"..\", \"..\", \"..\", \"tmp\", \"pwned.yaml\"]`\n2. The `..` segments traverse upward past the log directory.\n3. Final resolved path: `/tmp/pwned.yaml`\n\nTwo files are written:\n\n- **`.yaml` file** \u2014 contains YAML-serialized `InternalLogEntry` (action title, icon, timestamps, exit code, output, tags, username, tracking ID)\n- **`.log` file** \u2014 contains the raw command output (potentially attacker-influenced if the action echoes its arguments)\n\n### Impact\n\n- **Arbitrary file write** to any path writable by the OliveTin process.\n- OliveTin frequently runs as root inside Docker containers, so the writable scope is often the entire filesystem.\n- An attacker could:\n  - Overwrite OliveTin\u0027s own `sessions.yaml` to inject authenticated sessions.\n  - Write to entity file directories to inject malicious entity data.\n  - Write to system cron directories or other locations to achieve remote code execution.\n  - Cause denial of service by overwriting critical system files.\n\n### Suggested Fix\n\nValidate the `UniqueTrackingId` to ensure it only contains safe characters before use. A strict UUID format check is the simplest approach:\n\n```go\nimport \"regexp\"\n\nvar validTrackingID = regexp.MustCompile(`^[a-fA-F0-9\\-]+$`)\n\n// In ExecRequest, before accepting the user-supplied ID:\nif req.TrackingID == \"\" || !validTrackingID.MatchString(req.TrackingID) {\n    req.TrackingID = uuid.NewString()\n}\n```\n\nAlternatively, sanitize the filename in `stepSaveLog` by stripping or rejecting path separators and `..` sequences.",
  "id": "GHSA-364q-w7vh-vhpc",
  "modified": "2026-03-11T05:46:08Z",
  "published": "2026-03-11T00:09:41Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/OliveTin/OliveTin/security/advisories/GHSA-364q-w7vh-vhpc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31817"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OliveTin/OliveTin/commit/2f77000de44f65690f257e3cf8e2c8462b0e74c7"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/OliveTin/OliveTin"
    },
    {
      "type": "WEB",
      "url": "https://github.com/OliveTin/OliveTin/releases/tag/3000.11.2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "OliveTin\u0027s unsafe parsing of UniqueTrackingId can be used to write files"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

CVE-2026-31817 (GCVE-0-2026-31817)

FKIE_CVE-2026-31817

GHSA-364Q-W7VH-VHPC

Affected Code

Proof of Concept

Impact

Suggested Fix

Tags

Sightings

Nomenclature