Vulnerability-Lookup

CVE-2026-84203 (GCVE-0-2026-84203)

Vulnerability from cvelistv5 – Published: 2026-09-01 15:18 – Updated: 2026-09-01 18:05

Title

Memos 0.26.0 through 0.30.0 Insufficient Session Expiration on Password Change

Summary

Memos versions 0.26.0 through 0.30.0 fail to revoke refresh tokens when a user changes their password, allowing attackers to maintain account access. An attacker with a stolen refresh token can call the RefreshToken RPC to obtain new access tokens and rotate the refresh token indefinitely, bypassing the password change security measure.

Severity

8.6 (High)


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

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/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 2026-09-01 18:02 UTC

CWE

CWE-613 - Insufficient Session Expiration

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://github.com/usememos/memos	product
https://github.com/usememos/memos/blob/v0.30.0/se…	technical-description
https://github.com/usememos/memos/blob/v0.30.0/se…	technical-description
https://www.vulncheck.com/advisories/memos-0.26.0…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
usememos	memos	Affected: 0.26.0 , ≤ 0.30.0 (semver) cpe:2.3:a:usememos:memos::::::::

Date Public

2026-08-28 00:00

Credits

Michael Holmquist

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-84203

Vulnerability from fkie_nvd - Published: 2026-09-01 16:17 - Updated: 2026-09-08 20:18

Severity

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

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/usememos/memos
	disclosure@vulncheck.com	https://github.com/usememos/memos/blob/v0.30.0/server/auth/authenticator.go
	disclosure@vulncheck.com	https://github.com/usememos/memos/blob/v0.30.0/server/router/api/v1/user_service.go
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/memos-0.26.0-through-0.30.0-insufficient-session-expiration-on-password-change

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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  "id": "CVE-2026-84203",
  "lastModified": "2026-09-08T20:18:59.270",
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      "url": "https://github.com/usememos/memos"
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}

GHSA-47V8-26MF-HW38

Vulnerability from github – Published: 2026-09-01 18:30 – Updated: 2026-09-01 18:30

Details

Severity

8.1 (High)


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

8.6 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-84203"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-613"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-01T16:17:34Z",
    "severity": "HIGH"
  },
  "details": "Memos versions 0.26.0 through 0.30.0 fail to revoke refresh tokens when a user changes their password, allowing attackers to maintain account access. An attacker with a stolen refresh token can call the RefreshToken RPC to obtain new access tokens and rotate the refresh token indefinitely, bypassing the password change security measure.",
  "id": "GHSA-47v8-26mf-hw38",
  "modified": "2026-09-01T18:30:44Z",
  "published": "2026-09-01T18:30:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84203"
    },
    {
      "type": "WEB",
      "url": "https://github.com/usememos/memos"
    },
    {
      "type": "WEB",
      "url": "https://github.com/usememos/memos/blob/v0.30.0/server/auth/authenticator.go"
    },
    {
      "type": "WEB",
      "url": "https://github.com/usememos/memos/blob/v0.30.0/server/router/api/v1/user_service.go"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/memos-0.26.0-through-0.30.0-insufficient-session-expiration-on-password-change"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-84203 (GCVE-0-2026-84203)

FKIE_CVE-2026-84203

GHSA-47V8-26MF-HW38

Tags

Sightings

Nomenclature

Related by attack behaviour