High
Security advisory
Wire-server is the system server for the wire back-end services. Releases prior to v2022-03-01 are subject to a denial of service attack via a crafted object causing a hash collision. This collision causes the server to spend at least quadratic time parsing it which can lead to a denial of service for a heavily used server. The issue has been fixed in wire-server 2022-03-01 and is already deployed on all Wire managed services. On premise instances of wire-server need to be updated to 2022-03-01, so that their backends are no longer affected. There are no known workarounds for this issue.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-41119
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:55 UTC · Revision 1
Source evidence
Wire-server is the system server for the wire back-end services. Releases prior to v2022-03-01 are subject to a denial of service attack via a crafted object causing a hash collision. This collision causes the server to spend at least quadratic time parsing it which can lead to a denial of service for a heavily used server. The issue has been fixed in wire-server 2022-03-01 and is already deployed on all Wire managed services. On premise instances of wire-server need to be updated to 2022-03-01, so that their backends are no longer affected. There are no known workarounds for this issue.
osv:CVE-2021-41119
Complete source record
{
"id": "8ed0688b27e8332012c33a213fc1227c6894b04865cbbe066db5a7a502a7e473",
"url": "https://osv.dev/vulnerability/CVE-2021-41119",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-41119",
"summary": "Wire-server is the system server for the wire back-end services. Releases prior to v2022-03-01 are subject to a denial of service attack via a crafted object causing a hash collision. This collision causes the server to spend at least quadratic time parsing it which can lead to a denial of service for a heavily used server. The issue has been fixed in wire-server 2022-03-01 and is already deployed on all Wire managed services. On premise instances of wire-server need to be updated to 2022-03-01, so that their backends are no longer affected. There are no known workarounds for this issue.",
"evidence": "osv:CVE-2021-41119",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2021-41119",
"aliases": [
"CVE-2021-41119",
"GHSA-phxv-pffh-fq2r"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/wireapp/wire-server",
"type": "GIT",
"events": [
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},
{
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}
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"database_specific": {
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"range": [
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{
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"source": "CPE_RANGE"
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"modified": "2026-10-20T10:54:57.415473343Z",
"provider": "osv",
"references": [
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"https://cs-syd.eu/posts/2021-09-11-json-vulnerability"
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"source_id": "core-osv",
"document_id": 386539,
"published_at": "2022-04-13T19:15:08.99+00:00"
}