CVE-2026-62641: CWE-770 Allocation of Resources Without Limits or Throttling in Roundcube Webmail
In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, the TNEF decoder was subject to denial of service via a crafted compressed-RTF size.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-62641) affects Roundcube Webmail versions 1.6.0 and 1.7.0, where the TNEF decoder component improperly handles a crafted compressed-RTF size, leading to uncontrolled resource allocation. This condition can cause a denial of service (DoS) by exhausting system resources. The weakness is classified under CWE-770 (Allocation of Resources Without Limits or Throttling). The CVSS 3.1 base score is 4.3, reflecting a network attack vector with low complexity, no privileges required, user interaction needed, and impact limited to availability.
Potential Impact
The vulnerability allows an attacker to cause a denial of service in the affected Roundcube Webmail versions by exploiting the TNEF decoder with a specially crafted compressed-RTF size. There is no impact on confidentiality or integrity, only availability is affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider limiting exposure to untrusted compressed-RTF content or applying any recommended temporary mitigations from the vendor once available.
CVE-2026-62641: CWE-770 Allocation of Resources Without Limits or Throttling in Roundcube Webmail
Description
In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, the TNEF decoder was subject to denial of service via a crafted compressed-RTF size.
CVSS v3.1
Score 4.3medium
Affected software
pkg:github/roundcube/roundcubemailRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-62641) affects Roundcube Webmail versions 1.6.0 and 1.7.0, where the TNEF decoder component improperly handles a crafted compressed-RTF size, leading to uncontrolled resource allocation. This condition can cause a denial of service (DoS) by exhausting system resources. The weakness is classified under CWE-770 (Allocation of Resources Without Limits or Throttling). The CVSS 3.1 base score is 4.3, reflecting a network attack vector with low complexity, no privileges required, user interaction needed, and impact limited to availability.
Potential Impact
The vulnerability allows an attacker to cause a denial of service in the affected Roundcube Webmail versions by exploiting the TNEF decoder with a specially crafted compressed-RTF size. There is no impact on confidentiality or integrity, only availability is affected.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider limiting exposure to untrusted compressed-RTF content or applying any recommended temporary mitigations from the vendor once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-07-14T15:46:28.729Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a56617068715ace43d27051
Added to database: 07/14/2026, 16:18:56 UTC
Last enriched: 07/14/2026, 16:34:17 UTC
Last updated: 07/14/2026, 17:49:00 UTC
Views: 3
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