CVE-2026-102893

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Source
https://cve.org/CVERecord?id=CVE-2026-102893
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102893.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-102893
Aliases
  • GHSA-xw9h-9rcm-hx4m
Published
2026-10-14T15:49:03Z
Modified
2026-10-15T02:47:19Z
Severity
  • 9.1 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Zulip: OpenID Connect authentication ignores the email_verified claim
Details

Zulip is an open-source team collaboration tool. In Zulip Server versions through 12.1, GenericOpenIdConnectBackend matches the identity provider email claim to an active account's delivery_email without rejecting an explicitly false email_verified claim. If a configured identity provider returns an email address that the authenticating user does not control together with email_verified=false, Zulip can log the user into the existing account for that address. Exploitation requires a misconfigured trusted identity provider, and deployments whose authoritative identity provider only emits email addresses controlled by the authenticating user are not affected. This issue is fixed in version 12.2.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-287"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102893.json"
}
References

Affected packages

Git / github.com/zulip/zulip

Affected ranges

Type
GIT
Repo
https://github.com/zulip/zulip
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
1e73e1d754761b73c18135a3f25d0673f31cd8b3
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "12.2"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

1.*
1.3.0
1.3.1
1.3.10
1.3.11
1.3.13
1.3.2
1.3.3
1.3.4
1.3.5
1.3.6
1.3.7
1.3.8
1.3.9
1.4.0
1.5.0
1.6.0
1.7.0
1.8.0
1.8.0-rc1
1.9.0
1.9.0-rc2
1.9.0-rc3
10.*
10.0
10.0-beta1
10.0-beta2
11.*
11.0
11.0-beta1
11.0-beta2
11.0-dev
12.*
12.0
12.0-beta1
12.0-beta2
12.0-dev
12.1
2.*
2.0.0
2.0.0-rc1
2.1-dev
2.1.0
2.1.0-rc1
2.2-dev
3.*
3.0
3.0-dev
3.0-rc1
3.0-rc2
4.*
4.0
4.0-dev
5.*
5.0
5.0-dev
6.*
6.0
6.0-dev
7.*
7.0
7.0-beta3
7.0-dev
8.*
8.0
8.0-beta1
8.0-beta2
8.0-dev
9.*
9.0
9.0-beta1
9.0-dev
enterprise-1.*
enterprise-1.1.5
enterprise-1.2.0
shared-0.*
shared-0.0.1
shared-0.0.10
shared-0.0.11
shared-0.0.12
shared-0.0.13
shared-0.0.14
shared-0.0.15
shared-0.0.16
shared-0.0.17
shared-0.0.18
shared-0.0.2
shared-0.0.3
shared-0.0.4
shared-0.0.5
shared-0.0.6
shared-0.0.7
shared-0.0.8
shared-0.0.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102893.json"