Vulnerability-Lookup

RUSTSEC-2026-0158 (GHSA-H97M-27FX-42RX)

Vulnerability from osv_rustsec – Published: 2026-06-03 12:00 – Updated: 2026-06-04 11:56 – Source website

Summary

Incomplete message edit validation in matrix-sdk-ui

Details

The message edit validation logic in the matrix-sdk-ui crate before 0.16.1 is missing a check: when replacing an encrypted event, the replacement event itself is not required to be encrypted. This enables a malicious homeserver administrator (or an actor with equivalent power) to impersonate or spoof messages as if they were sent by a victim user.

Severity

4.9 (Medium)


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

References

URL

Type

	https://crates.io/crates/matrix-sdk-ui	PACKAGE
	https://rustsec.org/advisories/RUSTSEC-2026-0158.html	ADVISORY
	https://github.com/matrix-org/matrix-rust-sdk/sec…	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "matrix-sdk-ui",
        "purl": "pkg:cargo/matrix-sdk-ui"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "0.16.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [
    "GHSA-h97m-27fx-42rx",
    "CVE-2026-45057"
  ],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "The message edit validation logic in the matrix-sdk-ui crate before 0.16.1 is\nmissing a check: when replacing an encrypted event, the replacement event itself\nis not required to be encrypted. This enables a malicious homeserver\nadministrator (or an actor with equivalent power) to impersonate or spoof\nmessages as if they were sent by a victim user.",
  "id": "RUSTSEC-2026-0158",
  "modified": "2026-06-04T11:56:29Z",
  "published": "2026-06-03T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/matrix-sdk-ui"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0158.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-h97m-27fx-42rx"
    }
  ],
  "related": [],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Incomplete message edit validation in matrix-sdk-ui"
}

CVE-2026-45057 (GCVE-0-2026-45057)

Vulnerability from cvelistv5 – Published: 2026-09-11 21:12 – Updated: 2026-09-14 16:18

Title

matrix-sdk-ui: Incomplete edit validation

Summary

matrix-sdk-ui provides GUI-centric utilities on top of matrix-rust-sdk. The message edit validation logic in the `matrix-sdk-ui` crate prior to 0.17.0 is missing a check: when replacing an encrypted event, the replacement event itself is not required to be encrypted. This enables a malicious homeserver administrators (or actors with equivalent power) to impersonate or spoof messages as if they were sent by a victim user. `matrix-sdk-ui` 0.17.0 fixes the message edit validation logic to align with the algorithm for replacement events[^1] described in the Matrix specification. No known workarounds are available.

Severity

4.9 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-14 16:16 UTC

CWE

CWE-345 - Insufficient Verification of Data Authenticity

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/matrix-org/matrix-rust-sdk/sec…	x_refsource_CONFIRM
https://github.com/matrix-org/matrix-rust-sdk/pull/6454	x_refsource_MISC
https://github.com/matrix-org/matrix-rust-sdk/rel…	x_refsource_MISC
https://rustsec.org/advisories/RUSTSEC-2026-0158.html	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
matrix-org	matrix-sdk-ui	Affected: < 0.16.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-45057",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-14T16:16:05.439558Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-14T16:18:19.287Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "matrix-sdk-ui",
          "vendor": "matrix-org",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.16.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "matrix-sdk-ui provides GUI-centric utilities on top of matrix-rust-sdk. The message edit validation logic in the  `matrix-sdk-ui` crate prior to 0.17.0 is missing a check: when replacing an encrypted event, the replacement event itself is not required to be encrypted. This enables a malicious homeserver administrators (or actors with equivalent power) to impersonate or spoof messages as if they were sent by a victim user. `matrix-sdk-ui` 0.17.0 fixes the message edit validation logic to align with the algorithm for replacement events[^1] described in the Matrix specification. No known workarounds are available."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-345",
              "description": "CWE-345: Insufficient Verification of Data Authenticity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-11T21:12:17.797Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-h97m-27fx-42rx",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-h97m-27fx-42rx"
        },
        {
          "name": "https://github.com/matrix-org/matrix-rust-sdk/pull/6454",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/matrix-org/matrix-rust-sdk/pull/6454"
        },
        {
          "name": "https://github.com/matrix-org/matrix-rust-sdk/releases/tag/matrix-sdk-0.16.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/matrix-org/matrix-rust-sdk/releases/tag/matrix-sdk-0.16.1"
        },
        {
          "name": "https://rustsec.org/advisories/RUSTSEC-2026-0158.html",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://rustsec.org/advisories/RUSTSEC-2026-0158.html"
        }
      ],
      "source": {
        "advisory": "GHSA-h97m-27fx-42rx",
        "discovery": "UNKNOWN"
      },
      "title": "matrix-sdk-ui: Incomplete edit validation"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-45057",
    "datePublished": "2026-09-11T21:12:17.797Z",
    "dateReserved": "2026-05-08T18:07:27.342Z",
    "dateUpdated": "2026-09-14T16:18:19.287Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-H97M-27FX-42RX

Vulnerability from github – Published: 2026-06-04 14:50 – Updated: 2026-06-04 14:50

Summary

matrix-sdk-ui: Incomplete edit validation

Details

Impact

The message edit validation logic in the matrix-sdk-ui crate before 0.16.1 is missing a check: when replacing an encrypted event, the replacement event itself is not required to be encrypted. This enables a malicious homeserver administrator (or an actor with equivalent power) to impersonate or spoof messages as if they were sent by a victim user.

Patches

matrix-sdk-ui 0.16.1 fixes the message edit validation logic to align with the algorithm for replacement events^1 described in the Matrix specification.

Workarounds

N/A

References

Pull request: https://github.com/matrix-org/matrix-rust-sdk/pull/6454

For more information

If you have any questions or comments about this advisory, please email us at security at matrix.org.

Severity

4.9 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "matrix-sdk-ui"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.16.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-45057"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-345"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-04T14:50:47Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\nThe message edit validation logic in the  `matrix-sdk-ui` crate before 0.16.1 is missing a check: when replacing an encrypted event, the replacement event itself is not required to be encrypted. This enables a malicious homeserver administrator (or an actor with equivalent power) to impersonate or spoof messages as if they were sent by a victim user.\n\n### Patches\n`matrix-sdk-ui` 0.16.1 fixes the message edit validation logic to align with the algorithm for replacement events[^1] described in the Matrix specification.\n\n### Workarounds\nN/A\n\n### References\n* Pull request: https://github.com/matrix-org/matrix-rust-sdk/pull/6454\n\n### For more information\nIf you have any questions or comments about this advisory, please email us at [security at matrix.org](mailto:security@matrix.org).\n\n[^1]: https://spec.matrix.org/unstable/client-server-api/#validity-of-replacement-events",
  "id": "GHSA-h97m-27fx-42rx",
  "modified": "2026-06-04T14:50:47Z",
  "published": "2026-06-04T14:50:47Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-h97m-27fx-42rx"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-rust-sdk/pull/6454"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/matrix-org/matrix-rust-sdk"
    },
    {
      "type": "WEB",
      "url": "https://github.com/matrix-org/matrix-rust-sdk/releases/tag/matrix-sdk-0.16.1"
    },
    {
      "type": "WEB",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0158.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "matrix-sdk-ui: Incomplete edit validation"
}

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.

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

RUSTSEC-2026-0158 (GHSA-H97M-27FX-42RX)

CVE-2026-45057 (GCVE-0-2026-45057)

GHSA-H97M-27FX-42RX

Impact

Patches

Workarounds

References

For more information

Tags

Sightings

Nomenclature

Related by attack behaviour