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Unbounded symbol caching in Apache Qpid Proton-Dotnet lets pre-authentication attackers exhaust memory, fixed in 1.1.0

Status: UPDATED  |  Advisory ID: CVE-2026-67465

Key Details

CVECVE-2026-67465
CVSS Score / Version7.5 (High) / CVSS v3.1
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Proseattack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is none; availability impact is high.
Affected productsApache qpid_proton-dotnet
Classified asCWE-770 (Allocation of Resources Without Limits or Throttling)
Exploitation prediction (EPSS)0.49% probability of exploitation in the next 30 days (41% percentile) -- FIRST.org's EPSS model.

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
Apacheqpid_proton-dotnet
SubsystemsGeneral OT
SectorsMultiple

What to Know

A pre-authentication attacker could leverage unbounded symbol value caching to cause resource exhaustion leading to denial of service.

This issue affects Apache Qpid Proton-Dotnet: through 1.0.0.

Users are recommended to upgrade to version 1.1.0, which fixes the issue.

What to Do

Monitor Apache's web page for any future patch releases. See vendor advisory link below.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-67465
Vendor advisoryhttps://lists.apache.org/thread/zl2pj5fo32lbyrwof89tdyrgt67bbo0m