CVE-2026-61910 (GCVE-0-2026-61910)
Vulnerability from cvelistv5 – Published: 2026-09-09 00:00 – Updated: 2026-09-09 19:54
VLAI
EPSS
VEX
Summary
An issue was discovered in Cyrus IMAP before 3.12.4. Mailbox/set let a sharee change a special-use role on shared mailboxes. An authenticated user with maySetKeywords on another user's mailbox could change that mailbox's specialuse annotation. This could allow the sharee to change the shared mailbox to perform the archived, snoozed, or other role, which might cause mail mail to be written to the shared mailbox, sharing more content than intended. (This is likely to be an unusual situation, made more unusual because if the target already has an non-shared mailbox with that role, role duplication suppression will prevent the update.)
Severity
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| cyrusimap | Cyrus IMAP |
Affected:
0 , < 3.8.8
(semver)
Affected: 3.9.0 , < 3.10.4 (semver) Affected: 3.11.0 , < 3.12.4 (semver) cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:* cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:* cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:* |
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"descriptions": [
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}
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"metrics": [
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"baseScore": 3.5,
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"confidentialityImpact": "LOW",
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"cveId": "CVE-2026-61910",
"datePublished": "2026-09-09T00:00:00.000Z",
"dateReserved": "2026-07-13T00:00:00.000Z",
"dateUpdated": "2026-09-09T19:54:41.081Z",
"state": "PUBLISHED"
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"epss": "0.00188",
"percentile": "0.08555"
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"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-09-10T07:59:51+00:00",
"cve": "CVE-2026-61910",
"id": "CVE-2026-61910",
"initial_release_date": "2026-09-10T07:43:36.164000+00:00",
"product_status:known_affected": "20",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "cyrus-imapd: cyrus-imapd: Mailbox/set let sharee change special-use role on shared mailboxes",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-61910.json",
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"suse_vex": {
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"cve": "CVE-2026-61910",
"id": "CVE-2026-61910",
"initial_release_date": "2026-09-10T16:50:42Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-61910",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-61910.json",
"version": "2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
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.
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