---
cve: "CVE-2026-116739"
severity: "MEDIUM"
cvss: 5.3
epss: "0.3%"
vendor: "kisli"
kev: false
exploited: false
published: "2026-10-26 22:16:58"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-11-07T05:46:50+01:00"
---

# CVE-2026-116739

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

VMime through 0.9.2 contains an information disclosure vulnerability in the uuEncoder::decode function that writes uninitialized stack memory into decoded output for over-long lines. Attackers can send a crafted uuencode or x-uuencode MIME part with a large line length byte to leak up to 15 bytes of stack contents per line in decoded attachments.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-11-04 15:18:57
- CNA-CVSS: **5.3** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

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

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

## Schwachstellen-Klasse

- **CWE-908** — Use of Uninitialized Resource
  The product uses or accesses a resource that has not been initialized.

## Patch verfügbar (OSV)

- e85925eddc638939f0eeb7ee55ec047d04a760d8 (Commit)

## Referenzen

- <https://github.com/kisli/vmime/pull/363>
- <https://github.com/kisli/vmime/commit/e85925eddc638939f0eeb7ee55ec047d04a760d8>
- <https://github.com/kisli/vmime>
- <https://github.com/kisli/vmime/blob/v0.9.2/src/vmime/utility/encoder/uuEncoder.cpp#L311>
- <https://hackmd.io/@haindpwn/vmime-uuencode-decoder-oob-write>
- <https://www.vulncheck.com/advisories/vmime-through-0.9.2-uninitialized-stack-memory-disclosure-via-uuencode-decoder>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-116739/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_