Vulnerability-Lookup

CVE-2026-62669 (GCVE-0-2026-62669)

Vulnerability from cvelistv5 – Published: 2026-08-19 15:40 – Updated: 2026-08-19 18:18

Title

Grav Login Plugin: 2FA Bypass via 'login.regenerate2FASecret' - Secret Rotation During Pending Challenge

Summary

Grav Login Plugin adds login, basic ACL, and session wide messages to Grav. Prior to 3.8.11, the Grav Login plugin login.regenerate2FASecret task checks only that the pending-session user exists rather than requiring $user->authorized. After submitting a victim's correct password, an attacker can invoke taskRegenerate2FASecret() during the pending TOTP challenge, overwrite twofa_secret, read the replacement secret from the response, calculate a valid code, and complete authentication without the victim's second factor. This issue is fixed in version 3.8.11.

Severity

7.4 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 18:16 UTC

CWE

CWE-287 - Improper Authentication

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/getgrav/grav/security/advisori…	x_refsource_CONFIRM
https://github.com/getgrav/grav-plugin-login/comm…	x_refsource_MISC
https://github.com/getgrav/grav-plugin-login/rele…	x_refsource_MISC

Impacted products

2 products

Vendor	Product	Version	CPE status
getgrav	grav	Affected: < 2.0.4	guessed
getgrav	grav-plugin-login	Affected: < 3.8.11	guessed

Show details on NVD website

JSON

To clipboard

{
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      {
        "metrics": [
          {
            "other": {
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                "id": "CVE-2026-62669",
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                    "Technical Impact": "total"
                  }
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                "timestamp": "2026-08-19T18:16:05.801751Z",
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      "descriptions": [
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          "lang": "en",
          "value": "Grav Login Plugin adds login, basic ACL, and session wide messages to Grav. Prior to 3.8.11, the Grav Login plugin login.regenerate2FASecret task checks only that the pending-session user exists rather than requiring $user-\u003eauthorized. After submitting a victim\u0027s correct password, an attacker can invoke taskRegenerate2FASecret() during the pending TOTP challenge, overwrite twofa_secret, read the replacement secret from the response, calculate a valid code, and complete authentication without the victim\u0027s second factor. This issue is fixed in version 3.8.11."
        }
      ],
      "metrics": [
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            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/getgrav/grav/security/advisories/GHSA-7mgc-c7pq-3rr3"
        },
        {
          "name": "https://github.com/getgrav/grav-plugin-login/commit/5d1b722298cb947d8f434025d121b99152a2c630",
          "tags": [
            "x_refsource_MISC"
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        },
        {
          "name": "https://github.com/getgrav/grav-plugin-login/releases/tag/3.8.11",
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            "x_refsource_MISC"
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          "url": "https://github.com/getgrav/grav-plugin-login/releases/tag/3.8.11"
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      ],
      "source": {
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        "discovery": "UNKNOWN"
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      "title": "Grav Login Plugin: 2FA Bypass via \u0027login.regenerate2FASecret\u0027 - Secret Rotation During Pending Challenge"
    }
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    "vulnrichment": {
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FKIE_CVE-2026-62669

Vulnerability from fkie_nvd - Published: 2026-08-19 16:18 - Updated: 2026-08-19 19:17

Severity

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

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/getgrav/grav-plugin-login/commit/5d1b722298cb947d8f434025d121b99152a2c630
	security-advisories@github.com	https://github.com/getgrav/grav-plugin-login/releases/tag/3.8.11
	security-advisories@github.com	https://github.com/getgrav/grav/security/advisories/GHSA-7mgc-c7pq-3rr3

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "grav",
          "vendor": "getgrav",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 2.0.4"
            }
          ]
        },
        {
          "product": "grav-plugin-login",
          "vendor": "getgrav",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.8.11"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Grav Login Plugin adds login, basic ACL, and session wide messages to Grav. Prior to 3.8.11, the Grav Login plugin login.regenerate2FASecret task checks only that the pending-session user exists rather than requiring $user-\u003eauthorized. After submitting a victim\u0027s correct password, an attacker can invoke taskRegenerate2FASecret() during the pending TOTP challenge, overwrite twofa_secret, read the replacement secret from the response, calculate a valid code, and complete authentication without the victim\u0027s second factor. This issue is fixed in version 3.8.11."
    }
  ],
  "id": "CVE-2026-62669",
  "lastModified": "2026-08-19T19:17:22.087",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.4,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.2,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-62669",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-19T18:16:05.801751Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-19T16:18:19.460",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/getgrav/grav-plugin-login/commit/5d1b722298cb947d8f434025d121b99152a2c630"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/getgrav/grav-plugin-login/releases/tag/3.8.11"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/getgrav/grav/security/advisories/GHSA-7mgc-c7pq-3rr3"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

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.
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.

Action not permitted

CVE-2026-62669 (GCVE-0-2026-62669)

FKIE_CVE-2026-62669

Tags

Sightings

Nomenclature