Vulnerability-Lookup

GHSA-8G8J-R87H-P36X

Vulnerability from github – Published: 2026-02-26 22:50 – Updated: 2026-02-26 22:50

Summary

Vitess users with backup storage access can gain unauthorized access to production deployment environments

Details

Impact

Any user with read/write access to the backup storage location (e.g. an S3 bucket) can manipulate backup manifest files so that arbitrary code is later executed when that backup is restored. This can be used to provide that attacker with unintended/unauthorized access to the production deployment environment — allowing them to access information available in that environment as well as run any additional arbitrary commands there.

Patches

Fixes are expected to be released with versions v23.0.3 and v22.0.4 See fix commit at https://github.com/vitessio/vitess/commit/4c0173293907af9cb942a6683c465c3f1e9fdb5c

Workarounds

If maintainers intended to use an external decompressor then they can always specify that decompressor command in the --external-decompressor flag value for vttablet and vtbackup. That then overrides any value specified in the manifest file.

If maintainers did not intend to use an external decompressor, nor an internal one, then they can specify a value such as cat or tee in the --external-decompressor flag value for vttablet and vtbackup to ensure that a harmless command is always used.

References

Users can read more about the issue here: https://github.com/vitessio/vitess/issues/19459

Severity ?

8.4 (High)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "vitess.io/vitess"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.23.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-27965"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-26T22:50:37Z",
    "nvd_published_at": "2026-02-26T02:16:23Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nAny user with read/write access to the backup storage location (e.g. an S3 bucket) can manipulate backup manifest files so that arbitrary code is later executed when that backup is restored. This can be used to provide that attacker with unintended/unauthorized access to the production deployment environment \u2014 allowing them to access information available in that environment as well as run any additional arbitrary commands there.\n\n### Patches\nFixes are expected to be released with versions v23.0.3 and v22.0.4\nSee fix commit at https://github.com/vitessio/vitess/commit/4c0173293907af9cb942a6683c465c3f1e9fdb5c\n\n### Workarounds\n\nIf maintainers *intended* to use an external decompressor then they can always specify that decompressor command in the `--external-decompressor` flag value for `vttablet` and `vtbackup`. That then overrides any value specified in the manifest file.\n\nIf maintainers did *not intend* to use an external decompressor, nor an internal one, then they can specify a value such as `cat` or `tee` in the `--external-decompressor` flag value for `vttablet` and `vtbackup` to ensure that a harmless command is always used. \n\n### References\n\nUsers can read more about the issue here: https://github.com/vitessio/vitess/issues/19459",
  "id": "GHSA-8g8j-r87h-p36x",
  "modified": "2026-02-26T22:50:37Z",
  "published": "2026-02-26T22:50:37Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vitessio/vitess/security/advisories/GHSA-8g8j-r87h-p36x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27965"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitessio/vitess/issues/19459"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitessio/vitess/pull/19460"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitessio/vitess/commit/4c0173293907af9cb942a6683c465c3f1e9fdb5c"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vitessio/vitess"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Vitess users with backup storage access can gain unauthorized access to production deployment environments"
}

CVE-2026-27965 (GCVE-0-2026-27965)

Vulnerability from cvelistv5 – Published: 2026-02-26 01:49 – Updated: 2026-02-26 19:32

Title

Vitess users with backup storage access can gain unauthorized access to production deployment environments

Summary

Vitess is a database clustering system for horizontal scaling of MySQL. Prior to versions 23.0.3 and 22.0.4, anyone with read/write access to the backup storage location (e.g. an S3 bucket) can manipulate backup manifest files so that arbitrary code is later executed when that backup is restored. This can be used to provide that attacker with unintended/unauthorized access to the production deployment environment — allowing them to access information available in that environment as well as run any additional arbitrary commands there. Versions 23.0.3 and 22.0.4 contain a patch. Some workarounds are available. Those who intended to use an external decompressor then can always specify that decompressor command in the `--external-decompressor` flag value for `vttablet` and `vtbackup`. That then overrides any value specified in the manifest file. Those who did not intend to use an external decompressor, nor an internal one, can specify a value such as `cat` or `tee` in the `--external-decompressor` flag value for `vttablet` and `vtbackup` to ensure that a harmless command is always used.

Severity ?

8.4 (High)


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

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

GitHub_M

References

URL

Tags

	https://github.com/vitessio/vitess/security/advis…	x_refsource_CONFIRM
	https://github.com/vitessio/vitess/issues/19459	x_refsource_MISC
	https://github.com/vitessio/vitess/pull/19460	x_refsource_MISC
	https://github.com/vitessio/vitess/commit/4c01732…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	vitessio	vitess	Affected: < 22.0.4 Affected: >= 23.0.0, < 23.0.3

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-27965",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-26T19:32:38.363771Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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    "cna": {
      "affected": [
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          "product": "vitess",
          "vendor": "vitessio",
          "versions": [
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            },
            {
              "status": "affected",
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            }
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        {
          "lang": "en",
          "value": "Vitess is a database clustering system for horizontal scaling of MySQL. Prior to versions 23.0.3 and 22.0.4, anyone with read/write access to the backup storage location (e.g. an S3 bucket) can manipulate backup manifest files so that arbitrary code is later executed when that backup is restored. This can be used to provide that attacker with unintended/unauthorized access to the production deployment environment \u2014 allowing them to access information available in that environment as well as run any additional arbitrary commands there. Versions 23.0.3 and 22.0.4 contain a patch. Some workarounds are available. Those who intended to use an external decompressor then can always specify that decompressor command in the `--external-decompressor` flag value for `vttablet` and `vtbackup`. That then overrides any value specified in the manifest file. Those who did not intend to use an external decompressor, nor an internal one, can specify a value such as `cat` or `tee` in the `--external-decompressor` flag value for `vttablet` and `vtbackup` to ensure that a harmless command is always used."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "privilegesRequired": "HIGH",
            "subAvailabilityImpact": "LOW",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:L/SC:L/SI:L/SA:L",
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            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
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      ],
      "problemTypes": [
        {
          "descriptions": [
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              "cweId": "CWE-78",
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              "type": "CWE"
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-26T01:49:10.071Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      },
      "references": [
        {
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          "tags": [
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        },
        {
          "name": "https://github.com/vitessio/vitess/pull/19460",
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        {
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          "tags": [
            "x_refsource_MISC"
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          "url": "https://github.com/vitessio/vitess/commit/4c0173293907af9cb942a6683c465c3f1e9fdb5c"
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      "source": {
        "advisory": "GHSA-8g8j-r87h-p36x",
        "discovery": "UNKNOWN"
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      "title": "Vitess users with backup storage access can gain unauthorized access to production deployment environments"
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  "cveMetadata": {
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    "dateReserved": "2026-02-25T03:24:57.793Z",
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  },
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  "dataVersion": "5.2"
}

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

GHSA-8G8J-R87H-P36X

Impact

Patches

Workarounds

References

CVE-2026-27965 (GCVE-0-2026-27965)

Tags

Sightings

Nomenclature