Medium
Element iOS is vulnerable due to missing decoration for events decrypted with untrusted Megolm sessions
Type: advisorySources: OSV
Element iOS is an iOS Matrix client provided by Element. It is based on MatrixSDK. Prior to version 1.9.7, events encrypted using Megolm for which trust could not be established did not get decorated accordingly (with warning shields). Therefore a malicious homeserver could inject messages into the room without the user being alerted that the messages were not sent by a verified group member, even if the user has previously verified all group members. This issue has been patched in Element iOS 1.9.7. There are currently no known workarounds.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2022-41904
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 22:58 UTC · Revision 1
Source evidence
Element iOS is vulnerable due to missing decoration for events decrypted with untrusted Megolm sessions
core-osv · Original sourcePublished 11 Nov 2022, 00:00 UTC
Element iOS is an iOS Matrix client provided by Element. It is based on MatrixSDK. Prior to version 1.9.7, events encrypted using Megolm for which trust could not be established did not get decorated accordingly (with warning shields). Therefore a malicious homeserver could inject messages into the room without the user being alerted that the messages were not sent by a verified group member, even if the user has previously verified all group members. This issue has been patched in Element iOS 1.9.7. There are currently no known workarounds.
osv:CVE-2022-41904
Complete source record
{
"id": "a1e40c348511b4a80c921212e5d6d7a38d9342ceca9cfad776d2ea6a8f741d86",
"url": "https://osv.dev/vulnerability/CVE-2022-41904",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Element iOS is vulnerable due to missing decoration for events decrypted with untrusted Megolm sessions",
"summary": "Element iOS is an iOS Matrix client provided by Element. It is based on MatrixSDK. Prior to version 1.9.7, events encrypted using Megolm for which trust could not be established did not get decorated accordingly (with warning shields). Therefore a malicious homeserver could inject messages into the room without the user being alerted that the messages were not sent by a verified group member, even if the user has previously verified all group members. This issue has been patched in Element iOS 1.9.7. There are currently no known workarounds.",
"evidence": "osv:CVE-2022-41904",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2022-41904",
"aliases": [
"CVE-2022-41904",
"GHSA-fm8m-99j7-323g"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/element-hq/element-ios",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "431e48d296b21cbfe1be213f98b000b4575d7312"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "1.9.7"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "431e48d296b21cbfe1be213f98b000b4575d7312"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v1.9.7"
},
{
"cpe": "cpe:2.3:a:element:element:*:*:*:*:*:iphone_os:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "1.9.7"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v1.9.6",
"v1.9.5",
"v1.9.4",
"v1.9.3",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-41904.json"
}
}
],
"modified": "2026-10-28T02:30:32.067032594Z",
"provider": "osv",
"references": [
"https://github.com/vector-im/element-ios/releases/tag/v1.9.7",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/41xxx/CVE-2022-41904.json",
"https://github.com/vector-im/element-ios/security/advisories/GHSA-fm8m-99j7-323g",
"https://nvd.nist.gov/vuln/detail/CVE-2022-41904"
],
"provider_metadata": {
"cwe_ids": [
"CWE-357"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/41xxx/CVE-2022-41904.json"
}
},
"related_cves": [
{
"value": "CVE-2022-41904",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 499203,
"published_at": "2022-11-11T00:00:00+00:00"
}