Vulnerability-Lookup

CVE-2026-48790 (GCVE-0-2026-48790)

Vulnerability from cvelistv5 – Published: 2026-08-11 17:25 – Updated: 2026-08-12 22:13

Title

turso-cli persists Turso platform JWT with world-readable (0o644) file permissions

Summary

Turso CLI is the command line interface (CLI) to the open-source database Turso. Versions prior to 1.0.26 persist the user's Turso platform JWT to `settings.json` using Viper's default `configPermissions` of `0o644`, leaving the credential file world-readable on standard Linux and macOS systems. Any other local UID on the host can read the file and recover the platform JWT, which grants full Turso platform access scoped to the user's organizations. Version 1.0.26 patches the issue.

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 22:07 UTC

CWE

CWE-276 - Incorrect Default Permissions
CWE-732 - Incorrect Permission Assignment for Critical Resource

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7618 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/tursodatabase/turso-cli/securi…	x_refsource_CONFIRM
https://github.com/tursodatabase/turso-cli/commit…	x_refsource_MISC
https://github.com/spf13/viper/blob/v1.21.0/viper…	x_refsource_MISC
https://github.com/spf13/viper/blob/v1.21.0/viper…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
tursodatabase	turso-cli	Affected: < 1.0.26	guessed

Show details on NVD website

JSON

To clipboard

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}

FKIE_CVE-2026-48790

Vulnerability from fkie_nvd - Published: 2026-08-11 18:17 - Updated: 2026-09-09 20:46

Severity

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

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/spf13/viper/blob/v1.21.0/viper.go#L1688
	security-advisories@github.com	https://github.com/spf13/viper/blob/v1.21.0/viper.go#L198
	security-advisories@github.com	https://github.com/tursodatabase/turso-cli/commit/ffb914849216ef5a86353b3fa6cee66f33af3b66
	security-advisories@github.com	https://github.com/tursodatabase/turso-cli/security/advisories/GHSA-57f6-pvx8-hwj6

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "turso-cli",
          "vendor": "tursodatabase",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.0.26"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Turso CLI is the command line interface (CLI) to the open-source database Turso. Versions prior to 1.0.26 persist the user\u0027s Turso platform JWT to `settings.json` using Viper\u0027s default `configPermissions` of `0o644`, leaving the credential file world-readable on standard Linux and macOS systems. Any other local UID on the host can read the file and recover the platform JWT, which grants full Turso platform access scoped to the user\u0027s organizations. Version 1.0.26 patches the issue."
    }
  ],
  "id": "CVE-2026-48790",
  "lastModified": "2026-09-09T20:46:02.457",
  "metrics": {
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      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
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        "type": "Secondary"
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}

GHSA-57F6-PVX8-HWJ6

Vulnerability from github – Published: 2026-06-26 20:44 – Updated: 2026-06-26 20:44

Summary

turso-cli persists Turso platform JWT with world-readable (0o644) file permissions

Details

Summary

turso-cli persists the user's Turso platform JWT to settings.json using Viper's default configPermissions of 0o644, leaving the credential file world-readable on standard Linux and macOS systems. Any other local UID on the host can read the file and recover the platform JWT, which grants full Turso platform access scoped to the user's organizations.

Impact

The token in settings.json grants the holder full Turso platform access — create or destroy databases, rotate credentials, exfiltrate data, change billing settings — for any organization the user belongs to.

Because the file is world-readable, the credential is reachable by:

Cron jobs or daemons running as a different system user on the same host
Sandboxed CI runners with a mounted home directory
Containers with a bind-mounted host home
Co-tenants on a shared multi-user developer or jumpbox host

The file path resolves through configdir.LocalConfig("turso"):

macOS: ~/Library/Application Support/turso/settings.json
Linux: ~/.config/turso/settings.json (or $XDG_CONFIG_HOME/turso/settings.json)

It contains the platform JWT in plaintext JSON alongside organization and username fields.

Comparable CLIs (gh, aws, docker, gcloud, plus close peers planetscale, neon, upstash) write credential files at 0o600 explicitly, so this is a deviation from the cross-vendor baseline rather than a deliberate trade-off.

Details

The OAuth callback handler stores the platform JWT via the settings layer:

// internal/cmd/auth.go:205-214
jwt, err := callbackServer.Result()
...
settings.SetToken(jwt)

SetToken writes through Viper:

// internal/settings/settings.go:124-127
func (s *Settings) SetToken(token string) {
    viper.Set("token", token)
    s.changed = true
}

Persistence runs through viper.WriteConfig:

// internal/settings/settings.go:96-101
func TryToPersistChanges() error {
    if err := viper.WriteConfig(); err != nil {
        return fmt.Errorf("failed to persist turso settings file: %w", err)
    }
    return nil
}

Viper v1.21.0 (pinned in turso-cli go.mod) initializes configPermissions to os.FileMode(0o644) at viper.go:198 and passes that mode straight to os.OpenFile at viper.go:1688. Without a call to viper.SetConfigPermissions(0o600), the resulting settings.json is created at 0o644.

A grep over the auth-config write path under internal/ returns zero hits for Chmod, 0o600, or 0600, confirming there is no follow-up tightening of the file mode anywhere on the persistence path.

Proof of concept

Minimal reproducer using the same Viper version turso-cli pins (github.com/spf13/viper v1.21.0):

package main

import (
    "fmt"
    "os"
    "path/filepath"

    "github.com/spf13/viper"
)

func main() {
    dir, _ := os.MkdirTemp("", "viperpoc-*")
    defer os.RemoveAll(dir)

    viper.SetConfigName("settings")
    viper.SetConfigType("json")
    viper.AddConfigPath(dir)

    viper.Set("token", "FAKE_TURSO_JWT_xxxxxxxxxxxxxxxxxxxx")
    viper.Set("organization", "exampleorg")
    viper.SafeWriteConfig()

    st, _ := os.Stat(filepath.Join(dir, "settings.json"))
    fmt.Printf("mode: %o\n", st.Mode()&0o777)
}

$ go run main.go mode: 644

The same SafeWriteConfig / WriteConfig calls turso-cli uses produce the same 0o644 mode in a real turso auth login flow.

Remediation

One-line fix at the existing Viper configuration site in internal/settings/settings.go (around lines 48-50):

viper.SetConfigName("settings")
viper.SetConfigType("json")
viper.AddConfigPath(configPath)
viper.SetConfigPermissions(0o600) // restrict settings.json to owner only

Defense in depth:

Add os.Chmod(configFile, 0o600) after TryToPersistChanges, or on read (as PlanetScale does in internal/config/config.go — they Stat the token file and self-heal if Mode() &^ 0o600 is nonzero). viper.SetConfigPermissions applies only on file creation, so an existing wider-mode file is not tightened otherwise.
Add os.Chmod(configPath, 0o700) after configdir.MakePath(configPath) (line 43) to close the equivalent gap on the enclosing directory, which is otherwise created under the default umask.

Patch: https://github.com/tursodatabase/turso-cli/commit/ffb914849216ef5a86353b3fa6cee66f33af3b66

Workarounds

Until upgraded, users can tighten the existing files manually:

# Linux
chmod 600 ~/.config/turso/settings.json
chmod 700 ~/.config/turso

# macOS
chmod 600 "$HOME/Library/Application Support/turso/settings.json"
chmod 700 "$HOME/Library/Application Support/turso"

This must be repeated after any operation that recreates the file (e.g. turso auth login) until the patched version is installed.

Resources

Patch commit: https://github.com/tursodatabase/turso-cli/commit/ffb914849216ef5a86353b3fa6cee66f33af3b66
Viper configPermissions default: https://github.com/spf13/viper/blob/v1.21.0/viper.go#L198
Viper write path: https://github.com/spf13/viper/blob/v1.21.0/viper.go#L1688
CWE-276: https://cwe.mitre.org/data/definitions/276.html
CWE-732: https://cwe.mitre.org/data/definitions/732.html

Severity

5.5 (Medium)


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

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.0.25"
      },
      "package": {
        "ecosystem": "Go",
        "name": "github.com/tursodatabase/turso-cli"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.26"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-48790"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-276",
      "CWE-732"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-26T20:44:39Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Summary\n\n`turso-cli` persists the user\u0027s Turso platform JWT to `settings.json` using Viper\u0027s default `configPermissions` of `0o644`, leaving the credential file world-readable on standard Linux and macOS systems. Any other local UID on the host can read the file and recover the platform JWT, which grants full Turso platform access scoped to the user\u0027s organizations.\n\n### Impact\n\nThe token in `settings.json` grants the holder full Turso platform access \u2014 create or destroy databases, rotate credentials, exfiltrate data, change billing settings \u2014 for any organization the user belongs to.\n\nBecause the file is world-readable, the credential is reachable by:\n\n- Cron jobs or daemons running as a different system user on the same host\n- Sandboxed CI runners with a mounted home directory\n- Containers with a bind-mounted host home\n- Co-tenants on a shared multi-user developer or jumpbox host\n\nThe file path resolves through `configdir.LocalConfig(\"turso\")`:\n\n- macOS: `~/Library/Application Support/turso/settings.json`\n- Linux: `~/.config/turso/settings.json` (or `$XDG_CONFIG_HOME/turso/settings.json`)\n\nIt contains the platform JWT in plaintext JSON alongside `organization` and `username` fields.\n\nComparable CLIs (`gh`, `aws`, `docker`, `gcloud`, plus close peers `planetscale`, `neon`, `upstash`) write credential files at `0o600` explicitly, so this is a deviation from the cross-vendor baseline rather than a deliberate trade-off.\n\n### Details\n\nThe OAuth callback handler stores the platform JWT via the settings layer:\n\n```go\n// internal/cmd/auth.go:205-214\njwt, err := callbackServer.Result()\n...\nsettings.SetToken(jwt)\n```\n\n`SetToken` writes through Viper:\n\n```go\n// internal/settings/settings.go:124-127\nfunc (s *Settings) SetToken(token string) {\n    viper.Set(\"token\", token)\n    s.changed = true\n}\n```\n\nPersistence runs through `viper.WriteConfig`:\n\n```go\n// internal/settings/settings.go:96-101\nfunc TryToPersistChanges() error {\n    if err := viper.WriteConfig(); err != nil {\n        return fmt.Errorf(\"failed to persist turso settings file: %w\", err)\n    }\n    return nil\n}\n```\n\nViper v1.21.0 (pinned in `turso-cli` `go.mod`) initializes `configPermissions` to `os.FileMode(0o644)` at `viper.go:198` and passes that mode straight to `os.OpenFile` at `viper.go:1688`. Without a call to `viper.SetConfigPermissions(0o600)`, the resulting `settings.json` is created at `0o644`.\n\nA `grep` over the auth-config write path under `internal/` returns zero hits for `Chmod`, `0o600`, or `0600`, confirming there is no follow-up tightening of the file mode anywhere on the persistence path.\n\n### Proof of concept\n\nMinimal reproducer using the same Viper version `turso-cli` pins (`github.com/spf13/viper v1.21.0`):\n\n```go\npackage main\n\nimport (\n    \"fmt\"\n    \"os\"\n    \"path/filepath\"\n\n    \"github.com/spf13/viper\"\n)\n\nfunc main() {\n    dir, _ := os.MkdirTemp(\"\", \"viperpoc-*\")\n    defer os.RemoveAll(dir)\n\n    viper.SetConfigName(\"settings\")\n    viper.SetConfigType(\"json\")\n    viper.AddConfigPath(dir)\n\n    viper.Set(\"token\", \"FAKE_TURSO_JWT_xxxxxxxxxxxxxxxxxxxx\")\n    viper.Set(\"organization\", \"exampleorg\")\n    viper.SafeWriteConfig()\n\n    st, _ := os.Stat(filepath.Join(dir, \"settings.json\"))\n    fmt.Printf(\"mode: %o\\n\", st.Mode()\u00260o777)\n}\n```\n$ go run main.go mode: 644\n\nThe same `SafeWriteConfig` / `WriteConfig` calls `turso-cli` uses produce the same `0o644` mode in a real `turso auth login` flow.\n\n### Remediation\n\nOne-line fix at the existing Viper configuration site in `internal/settings/settings.go` (around lines 48-50):\n\n```go\nviper.SetConfigName(\"settings\")\nviper.SetConfigType(\"json\")\nviper.AddConfigPath(configPath)\nviper.SetConfigPermissions(0o600) // restrict settings.json to owner only\n```\n\nDefense in depth:\n\n- Add `os.Chmod(configFile, 0o600)` after `TryToPersistChanges`, or on read (as PlanetScale does in `internal/config/config.go` \u2014 they `Stat` the token file and self-heal if `Mode() \u0026^ 0o600` is nonzero).  `viper.SetConfigPermissions` applies only on file creation, so an existing wider-mode file is not tightened otherwise.\n- Add `os.Chmod(configPath, 0o700)` after `configdir.MakePath(configPath)` (line 43) to close the equivalent gap on the enclosing directory, which is otherwise created under the default umask.\n\nPatch: https://github.com/tursodatabase/turso-cli/commit/ffb914849216ef5a86353b3fa6cee66f33af3b66\n\n### Workarounds\n\nUntil upgraded, users can tighten the existing files manually:\n\n```sh\n# Linux\nchmod 600 ~/.config/turso/settings.json\nchmod 700 ~/.config/turso\n\n# macOS\nchmod 600 \"$HOME/Library/Application Support/turso/settings.json\"\nchmod 700 \"$HOME/Library/Application Support/turso\"\n```\n\nThis must be repeated after any operation that recreates the file (e.g.\n`turso auth login`) until the patched version is installed.\n\n### Resources\n\n- Patch commit: https://github.com/tursodatabase/turso-cli/commit/ffb914849216ef5a86353b3fa6cee66f33af3b66\n- Viper `configPermissions` default: https://github.com/spf13/viper/blob/v1.21.0/viper.go#L198\n- Viper write path: https://github.com/spf13/viper/blob/v1.21.0/viper.go#L1688\n- CWE-276: https://cwe.mitre.org/data/definitions/276.html\n- CWE-732: https://cwe.mitre.org/data/definitions/732.html",
  "id": "GHSA-57f6-pvx8-hwj6",
  "modified": "2026-06-26T20:44:39Z",
  "published": "2026-06-26T20:44:39Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/tursodatabase/turso-cli/security/advisories/GHSA-57f6-pvx8-hwj6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/tursodatabase/turso-cli"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "turso-cli persists Turso platform JWT with world-readable (0o644) file permissions"
}

Sightings

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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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.
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CVE-2026-48790 (GCVE-0-2026-48790)

FKIE_CVE-2026-48790

GHSA-57F6-PVX8-HWJ6

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