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Fri, 28 Aug 2026 15:30:00 +0000
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| Metrics |
ssvc
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Fri, 28 Aug 2026 14:30:00 +0000
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| Title | CPU Exhaustion via Crafted Email Header Collision Triggering IMAP THREAD Denial of Service |
Fri, 28 Aug 2026 11:30:00 +0000
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| Description | An attacker that can send mail to a user can craft a message header whose values are chosen to collide in an internal hash table, which makes the IMAP THREAD command consume CPU disproportionate to the size of the message. This is a separate issue from CVE-2026-40014 and is not addressed by that fix. Whenever a mail client issues a THREAD command on the affected mailbox, this can cause degradation or denial of service for IMAP. Monitor system for abnormal CPU usage, kill the offending process and remove the offending message from the affected mailbox. Update to non-vulnerable version. No publicly available exploits are known. | |
| Weaknesses | CWE-400 | |
| References |
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| Metrics |
cvssV3_1
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Subscriptions
No data.
Status: PUBLISHED
Assigner: OX
Published:
Updated: 2026-08-28T15:02:36.570Z
Reserved: 2026-04-08T09:59:59.342Z
Link: CVE-2026-40017
Updated: 2026-08-28T15:01:12.943Z
Status : Received
Published: 2026-08-28T12:16:28.480
Modified: 2026-08-28T16:17:56.903
Link: CVE-2026-40017
No data.
OpenCVE Enrichment
Updated: 2026-08-28T14:15:04Z