a2aproject a2a-rs inmemory.rs information disclosure

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-113706
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-21 00:17:48 UTC
Updated2026-10-21 14:26:26 UTC
DescriptionA vulnerability was identified in a2aproject a2a-rs up to 0.4.3. Impacted is an unknown function of the file a2a-server/src/task_store/inmemory.rs. The manipulation of the argument historyLength leads to information disclosure. The attack is possible to be carried out remotely. The identifier of the patch is 68f1b7e772ae5d6c9e581ac9b48bcddd10fe70eb. To fix this issue, it is recommended to deploy a patch.

Risk And Classification

Primary CVSS: v4.0 5.1 MEDIUM from [email protected]

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.002500000 probability, percentile 0.154110000 (date 2026-10-21)

Problem Types: CWE-200 | CWE-284 | CWE-200 Information Disclosure | CWE-284 Improper Access Controls

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary5.1MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED5.1MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X
3.1[email protected]Primary3.5LOWCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N
3.1CNADECLARED3.5LOWCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C
3.0CNADECLARED3.5LOWCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C
2.0[email protected]Secondary4AV:N/AC:L/Au:S/C:P/I:N/A:N
2.0CNADECLARED4AV:N/AC:L/Au:S/C:P/I:N/A:N/E:ND/RL:OF/RC:C

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
Passive
Confidentiality
Low
Integrity
None
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA A2aproject A2a-rs affected 0.4.0 Not specified
CNA A2aproject A2a-rs affected 0.4.1 Not specified
CNA A2aproject A2a-rs affected 0.4.2 Not specified
CNA A2aproject A2a-rs affected 0.4.3 Not specified

References

ReferenceSourceLinkTags
vuldb.com/vuln/422868/cti [email protected] vuldb.com
github.com/a2aproject/a2a-rs/pull/122 [email protected] github.com
github.com/a2aproject/a2a-rs/commit/68f1b7e772ae5d6c9e581ac9b48bcddd10fe... [email protected] github.com
vuldb.com/cve/CVE-2026-113706 [email protected] vuldb.com
vuldb.com/vuln/422868 [email protected] vuldb.com
vuldb.com/submit/1015040 [email protected] vuldb.com
github.com/a2aproject/a2a-rs [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: colorfullbz (VulDB User) (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-10-20T00:00:00.000ZAdvisory disclosed
CNA2026-10-20T02:00:00.000ZVulDB entry created
CNA2026-10-20T18:02:48.000ZVulDB entry last update

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