---
cve: "CVE-2026-113705"
severity: "MEDIUM"
cvss: 6.9
epss: "0.3%"
vendor: "a2aproject"
kev: false
exploited: false
published: "2026-10-20 23:17:10"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-28T02:32:45+01:00"
---

# CVE-2026-113705

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

A vulnerability was determined in a2aproject a2a-rs up to 0.4.3. This issue affects some unknown processing of the file a2a-server/src/error.rs. Executing a manipulation can lead to information exposure through error message. The attack can be executed remotely. This patch is called 713b943af94ab2d521d483b841618b97a2e78a4d. A patch should be applied to remediate this issue.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulDB**
- State: PUBLISHED
- Stand: 2026-10-20 22:45:09
- CNA-CVSS: **6.9** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X`)

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Schwachstellen-Klasse

- **CWE-200** — Exposure of Sensitive Information to an Unauthorized Actor
  The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
- **CWE-209** — Generation of Error Message Containing Sensitive Information
  The product generates an error message that includes sensitive information about its environment, users, or associated data.

## Angriffsmuster (CAPEC)

- [CAPEC-13 — Subverting Environment Variable Values](https://capec.mitre.org/data/definitions/13.html) _(Severity: Very High)_
- [CAPEC-22 — Exploiting Trust in Client](https://capec.mitre.org/data/definitions/22.html) _(Severity: High)_
- [CAPEC-116 — Excavation](https://capec.mitre.org/data/definitions/116.html) _(Severity: Medium)_
- [CAPEC-169 — Footprinting](https://capec.mitre.org/data/definitions/169.html) _(Severity: Very Low)_
- [CAPEC-224 — Fingerprinting](https://capec.mitre.org/data/definitions/224.html) _(Severity: Very Low)_
- [CAPEC-285 — ICMP Echo Request Ping](https://capec.mitre.org/data/definitions/285.html) _(Severity: Low)_
- [CAPEC-287 — TCP SYN Scan](https://capec.mitre.org/data/definitions/287.html) _(Severity: Low)_
- [CAPEC-290 — Enumerate Mail Exchange (MX) Records](https://capec.mitre.org/data/definitions/290.html) _(Severity: Low)_

## ATT&CK-Techniken

- [T1562.003 — Impair Defenses:Impair Command History Logging](https://attack.mitre.org/techniques/T1562/003/)
- [T1574.006 — Hijack Execution Flow:Dynamic Linker Hijacking](https://attack.mitre.org/techniques/T1574/006/)
- [T1574.007 — Hijack Execution Flow:Path Interception by PATH Environment ](https://attack.mitre.org/techniques/T1574/007/)
- [T1217 — Browser Bookmark Discovery](https://attack.mitre.org/techniques/T1217/)
- [T1592 — Gather Victim Host Information](https://attack.mitre.org/techniques/T1592/)
- [T1595 — Active Scanning](https://attack.mitre.org/techniques/T1595/)

## Patch verfügbar (OSV)

- 713b943af94ab2d521d483b841618b97a2e78a4d

## Referenzen

- <https://vuldb.com/vuln/422867>
- <https://vuldb.com/vuln/422867/cti>
- <https://vuldb.com/cve/CVE-2026-113705>
- <https://vuldb.com/submit/1014888>
- <https://github.com/a2aproject/a2a-rs/pull/127>
- <https://github.com/a2aproject/a2a-rs/commit/713b943af94ab2d521d483b841618b97a2e78a4d>
- <https://github.com/a2aproject/a2a-rs/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-113705/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_