a2aproject a2a-dotnet up to 1.0.0-preview3 TaskProjection TaskProjection.ApplyStatus race condition

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.4$0-$5k0.00

Summaryinfo

A vulnerability was found in a2aproject a2a-dotnet up to 1.0.0-preview3. It has been classified as problematic. The impacted element is the function TaskProjection.ApplyStatus of the component TaskProjection. The manipulation leads to race condition. This vulnerability is traded as CVE-2026-116476. It is possible to initiate the attack remotely. There is no exploit available. The pull request to fix this issue awaits acceptance.

Detailsinfo

A vulnerability was found in a2aproject a2a-dotnet up to 1.0.0-preview3 and classified as problematic. This issue affects the function TaskProjection.ApplyStatus of the component TaskProjection. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is integrity, and availability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-116476. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available.

The pull request to fix this issue awaits acceptance.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.4
VulDB Temp Score: 5.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/26/2026 Advisory disclosed
10/26/2026 +0 days VulDB entry created
10/26/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 453
Status: Confirmed

CVE: CVE-2026-116476 (🔒)
GCVE (CVE): GCVE-0-2026-116476
GCVE (VulDB): GCVE-100-426389

Entryinfo

Created: 10/26/2026 12:04
Changes: 10/26/2026 12:04 (55)
Complete: 🔍
Submitter: colorfullbz
Cache ID: 216::103

Submitinfo

Accepted

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