Vulnerability-Lookup

CVE-2026-21882 (GCVE-0-2026-21882)

Vulnerability from cvelistv5 – Published: 2026-03-02 19:17 – Updated: 2026-03-02 19:44

Title

theshit's Improper Privilege Dropping Allows Local Privilege Escalation via Command Re-execution

Summary

theshit is a command-line utility that automatically detects and fixes common mistakes in shell commands. Prior to version 0.2.0, improper privilege dropping allows local privilege escalation via command re-execution. This issue has been patched in version 0.2.0.

Severity ?

8.4 (High)


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

CWE

CWE-273 - Improper Check for Dropped Privileges
CWE-269 - Improper Privilege Management
CWE-250 - Execution with Unnecessary Privileges

Assigner

GitHub_M

References

URL

Tags

	https://github.com/AsfhtgkDavid/theshit/security/…	x_refsource_CONFIRM
	https://github.com/AsfhtgkDavid/theshit/commit/52…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	AsfhtgkDavid	theshit	Affected: < 0.2.0

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-21882

Vulnerability from fkie_nvd - Published: 2026-03-02 20:16 - Updated: 2026-04-15 15:42

Severity ?

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

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/AsfhtgkDavid/theshit/commit/5293957b119e55212dce2c6dcbaf1d7eb794602a
	security-advisories@github.com	https://github.com/AsfhtgkDavid/theshit/security/advisories/GHSA-2j3p-gqw5-g59j

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "theshit is a command-line utility that automatically detects and fixes common mistakes in shell commands. Prior to version 0.2.0, improper privilege dropping allows local privilege escalation via command re-execution. This issue has been patched in version 0.2.0."
    },
    {
      "lang": "es",
      "value": "theshit es una utilidad de l\u00ednea de comandos que detecta y corrige autom\u00e1ticamente errores comunes en comandos de shell. Antes de la versi\u00f3n 0.2.0, una ca\u00edda de privilegios inadecuada permite la escalada de privilegios local mediante la reejecuci\u00f3n de comandos. Este problema ha sido parcheado en la versi\u00f3n 0.2.0."
    }
  ],
  "id": "CVE-2026-21882",
  "lastModified": "2026-04-15T15:42:24.190",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
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        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
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  "published": "2026-03-02T20:16:26.130",
  "references": [
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      "source": "security-advisories@github.com",
      "url": "https://github.com/AsfhtgkDavid/theshit/commit/5293957b119e55212dce2c6dcbaf1d7eb794602a"
    },
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      "source": "security-advisories@github.com",
      "url": "https://github.com/AsfhtgkDavid/theshit/security/advisories/GHSA-2j3p-gqw5-g59j"
    }
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          "lang": "en",
          "value": "CWE-250"
        },
        {
          "lang": "en",
          "value": "CWE-269"
        },
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          "lang": "en",
          "value": "CWE-273"
        }
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}

GHSA-2J3P-GQW5-G59J

Vulnerability from github – Published: 2026-03-02 17:44 – Updated: 2026-03-02 21:59

Summary

theshit's Improper Privilege Dropping Allows Local Privilege Escalation via Command Re-execution

Details

Impact

Vulnerability Type: Local Privilege Escalation (LPE) / Improper Privilege Management / Arbitrary Command Execution.

The application automatically re-executes the previously failed command but does not properly drop elevated privileges during this process.

When the tool is executed with sudo or otherwise runs with an effective UID of root, it records the last executed command and attempts to rerun it. However, the application fails to restore the original unprivileged user context before re-executing the command. As a result, the retried command is executed with root privileges, even if the original command was issued by an unprivileged user.

This allows a local attacker to intentionally trigger a failed command under elevated execution and gain arbitrary command execution as root via the retry mechanism.

Who is impacted: Any system where this tool is executed with elevated privileges is affected. The risk is especially high in environments where the tool is permitted to run via sudo, including configurations with NOPASSWD, as an unprivileged user can escalate privileges to root without additional interaction.

Proof of Concept

To verify the vulnerability without a shell, attempt to create a file in a root-protected directory.

1. Verify the file does not exist

sudo ls /root/proof_of_lpe
# Output: No such file or directory

2. Run the vulnerable command

sudo bash -c "SH_PREV_CMD='touch /root/proof_of_lpe' target/release/theshit fix"

3. Check if the file was created by root

sudo ls -l /root/proof_of_lpe

Expected Result: The command succeeds silently, and the file /root/proof_of_lpe is created, confirming arbitrary command execution with root privileges.

Patches

The issue has been fixed in version 0.1.2.

The patch ensures that privilege levels are correctly handled during command re-execution. Before retrying any previously executed command, the application now explicitly resets the effective UID and GID to the original invoking user.

Workarounds

If upgrading is not possible, users should avoid executing the application with sudo or as the root user.

As a temporary mitigation, administrators should restrict the use of the tool in privileged contexts and ensure it is not included in sudoers configurations, particularly with NOPASSWD. Running the tool strictly as an unprivileged user prevents exploitation of the retry mechanism.

References

Commit fixing the issue
CWE-269: Improper Privilege Management
CWE-273: Improper Check for Dropped Privileges
CWE-250: Execution with Unnecessary Privileges

Severity ?

8.4 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "theshit"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-21882"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-250",
      "CWE-269",
      "CWE-273"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-02T17:44:53Z",
    "nvd_published_at": "2026-03-02T20:16:26Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\n**Vulnerability Type:** Local Privilege Escalation (LPE) / Improper Privilege Management / Arbitrary Command Execution.\n\nThe application automatically re-executes the previously failed command but does not properly drop elevated privileges during this process.\n\nWhen the tool is executed with `sudo` or otherwise runs with an effective UID of root, it records the last executed command and attempts to rerun it. However, the application fails to restore the original unprivileged user context before re-executing the command. As a result, the retried command is executed with root privileges, even if the original command was issued by an unprivileged user.\n\nThis allows a local attacker to intentionally trigger a failed command under elevated execution and gain arbitrary command execution as root via the retry mechanism.\n\n**Who is impacted:**\nAny system where this tool is executed with elevated privileges is affected. The risk is especially high in environments where the tool is permitted to run via `sudo`, including configurations with `NOPASSWD`, as an unprivileged user can escalate privileges to root without additional interaction.\n\n### Proof of Concept\n\nTo verify the vulnerability without a shell, attempt to create a file in a root-protected directory.\n\n**1. Verify the file does not exist**\n```bash\nsudo ls /root/proof_of_lpe\n# Output: No such file or directory\n```\n\n**2. Run the vulnerable command**\n```bash\nsudo bash -c \"SH_PREV_CMD=\u0027touch /root/proof_of_lpe\u0027 target/release/theshit fix\"\n```\n\n**3. Check if the file was created by root**\n```bash\nsudo ls -l /root/proof_of_lpe\n```\n\n**Expected Result:**\nThe command succeeds silently, and the file `/root/proof_of_lpe` is created, confirming arbitrary command execution with root privileges.\n\n### Patches\n\nThe issue has been fixed in version **0.1.2**.\n\nThe patch ensures that privilege levels are correctly handled during command re-execution. Before retrying any previously executed command, the application now explicitly resets the effective UID and GID to the original invoking user.\n\n### Workarounds\n\nIf upgrading is not possible, users should avoid executing the application with `sudo` or as the root user.\n\nAs a temporary mitigation, administrators should restrict the use of the tool in privileged contexts and ensure it is not included in `sudoers` configurations, particularly with `NOPASSWD`. Running the tool strictly as an unprivileged user prevents exploitation of the retry mechanism.\n\n### References\n\n* [Commit fixing the issue](https://github.com/AsfhtgkDavid/theshit/commit/5293957b119e55212dce2c6dcbaf1d7eb794602a)\n* CWE-269: Improper Privilege Management\n* CWE-273: Improper Check for Dropped Privileges\n* CWE-250: Execution with Unnecessary Privileges",
  "id": "GHSA-2j3p-gqw5-g59j",
  "modified": "2026-03-02T21:59:23Z",
  "published": "2026-03-02T17:44:53Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/AsfhtgkDavid/theshit/security/advisories/GHSA-2j3p-gqw5-g59j"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21882"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AsfhtgkDavid/theshit/commit/5293957b119e55212dce2c6dcbaf1d7eb794602a"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/AsfhtgkDavid/theshit"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "theshit\u0027s Improper Privilege Dropping Allows Local Privilege Escalation via Command Re-execution"
}

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-2026-21882 (GCVE-0-2026-21882)

FKIE_CVE-2026-21882

GHSA-2J3P-GQW5-G59J

Impact

Proof of Concept

Patches

Workarounds

References

Tags

Sightings

Nomenclature