a2aproject a2a-rs up to 0.4.3 inmemory.rs historyLength information disclosure

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 (≈)
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CTI Interest Score
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3.4$0-$5k2.30

Summaryinfo

A vulnerability described as problematic has been identified in a2aproject a2a-rs up to 0.4.3. The affected element is an unknown function of the file a2a-server/src/task_store/inmemory.rs. The manipulation of the argument historyLength results in information disclosure. This vulnerability was named CVE-2026-113706. The attack may be performed from remote. There is no available exploit. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as problematic, was found in a2aproject a2a-rs up to 0.4.3. Affected is an unknown code block of the file a2a-server/src/task_store/inmemory.rs. The manipulation of the argument historyLength with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-113706. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Applying the patch 68f1b7e772ae5d6c9e581ac9b48bcddd10fe70eb is able to eliminate this problem. The bugfix is ready for download at github.com.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 68f1b7e772ae5d6c9e581ac9b48bcddd10fe70eb

Timelineinfo

10/20/2026 Advisory disclosed
10/20/2026 +0 days VulDB entry created
10/20/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 122
Status: Confirmed

CVE: CVE-2026-113706 (🔒)
GCVE (CVE): GCVE-0-2026-113706
GCVE (VulDB): GCVE-100-422868

Entryinfo

Created: 10/20/2026 18:02
Changes: 10/20/2026 18:02 (57)
Complete: 🔍
Submitter: colorfullbz
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #1015040: a2aproject a2a-rs a2a-server-lf ≤ 0.4.3 CWE-200 (by colorfullbz)

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