openmcdf up to 3.1.2 CFB File Storage.EnumerateEntries infinite loop

CVSS Meta Temp Score
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability was found in openmcdf up to 3.1.2. It has been rated as problematic. This impacts the function Storage.EnumerateEntries of the component CFB File Handler. The manipulation leads to infinite loop. This vulnerability is uniquely identified as CVE-2026-41511. Local access is required to approach this attack. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in openmcdf up to 3.1.2 and classified as problematic. This issue affects the function Storage.EnumerateEntries of the component CFB File Handler. The manipulation with an unknown input leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is availability. The summary by CVE is:

OpenMcdf is a fully .NET / C# library to manipulate Compound File Binary File Format files, also known as Structured Storage. Prior to version 3.1.3, OpenMcdf does not detect cycles in the directory entry red-black tree of a Compound File Binary (CFB) document. A crafted CFB file with a cycle in the LeftSiblingID / RightSiblingID chain causes Storage.EnumerateEntries() and Storage.OpenStream() to loop indefinitely, consuming the calling thread with no possibility of recovery via try/catch. This issue has been patched in version 3.1.3.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-41511 since 04/20/2026. The exploitation is known to be easy. Attacking locally is a requirement. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 3.1.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 24f445a557fc4f46461cf6d02d296cce16c293a0 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 5.0

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CNA Base Score: 6.2
CNA Vector (GitHub_M): 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: openmcdf 3.1.3
Patch: 24f445a557fc4f46461cf6d02d296cce16c293a0

Timelineinfo

04/20/2026 CVE reserved
05/08/2026 +18 days Advisory disclosed
05/08/2026 +0 days VulDB entry created
06/04/2026 +27 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-jxpf-xq2m-q525
Status: Confirmed

CVE: CVE-2026-41511 (🔒)
GCVE (CVE): GCVE-0-2026-41511
GCVE (VulDB): GCVE-100-362327

Entryinfo

Created: 05/08/2026 21:38
Updated: 06/04/2026 14:17
Changes: 05/08/2026 21:38 (68), 06/04/2026 14:17 (11)
Complete: 🔍
Cache ID: 216::103

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