VulnSocial

CVE-2026-41511Disclosure(openmcdf / openmcdf)

LOWCVSS 5.5 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Patch openmcdf openmcdf systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

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.

openmcdf CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Patch / fix
Exploit / PoC references
Other references
Weakness type (CWE)
CWE-835

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • openmcdf

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • Disclosure: 2 classified signals
  • General: 1 classified signal
  • Peaked at 2 mentions on most recent observed day (2026-05-09)
  • 3 total mentions across 2 days

Affected systems

Vendors
openmcdf
Products
openmcdf

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-04-23: 1Mentions · 2026-05-09: 2Patch / Workaround · 2026-05-09: 1Technical Details · 2026-04-23: 104-2305-09
Signal classification2 categories
Disclosure
266.7%
General
133.3%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-04-231
Disclosure1
2026-05-092
Disclosure1General1
Full discourse3 posts
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-41511 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 no… https://www.cve.org/CVERecord?id=CVE-2026-41511 ----- Traducción: CVE-2026-41511 Ope… http://infoflow.cloud`

    Post summary

    The post briefly notes CVE‑2026‑41511 in the OpenMcdf .NET library, indicating the issue is fixed in version 3.1.3, but offers no exploitation details or active usage evidence.

    0000015
    76 followersView on X
  • CVE@CVEnew
    General

    CVE-2026-41511 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 no… https://www.cve.org/CVERecord?id=CVE-2026-41511

    Post summary

    The provided text offers only a brief, incomplete statement about CVE‑2026‑41511 and a link to its CVE record, with no additional technical or actionable information.

    00000129
    57.5K followersView on X
  • DailyCVE@dailycve
    Disclosure

    🟠 OpenMcdf, Denial of Service (DoS), #CVE-2026-41511 (Medium) https://dailycve.com/openmcdf-denial-of-service-dos-cve-2026-41511-medium/

    Post summary

    The text announces a new Denial of Service vulnerability (CVE-2026-41511) with Medium severity, but contains no details about exploitation, patches, or PoC.

    00000272
    183 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appopenmcdfopenmcdf---

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