Report an incident
Back
  • About us
  • For experts
Report an incident
About us
About our team Contact
Baza wiedzy
Fałszywe inwestycje Uważaj na fałszywe sklepy online (Nie)bezpieczne płatności Fałszywi konsultanci Zadbaj o bezpieczne hasła i logowanie Fałszywe załączniki w mailach Fałszywe prośby o szybki przelew Fałszywe SMSy - plaga ostatnich miesięcy Bezpieczny telefon
Biuletyn OUCH!
Porady bezpieczeństwa OUCH!
Tools
n6 Artemis MWDB
CVD program
CVD policy Advisories

Vulnerability in Carbone software
18 August 2026 | CERT Polska | #vulnerability, #warning, #cve
CVE ID CVE-2026-18929
Publication date 18 August 2026
Vendor Carbone
Product Carbone
Vulnerable versions All before 3.8.2
Vulnerability type (CWE) Improper handling of highly compressed data (data amplification) (CWE-409)
Report source Report to CERT Polska

Description

CERT Polska has received a report about vulnerability in Carbone software and participated in coordination of its disclosure.

The vulnerability CVE-2026-18929: Carbone is vulnerable to Denial of Service due to lack of protection against zip bombs when processing .docx files. The library uses yazl for zip decompression without validating entry sizes, allowing an attacker to supply a malicious .docx file containing a zip bomb that decompresses to a significantly larger size, causing excessive memory consumption and crashing the application server.

The issue was fixed in versions: 3.8.2, 4.26.3 and 5.4.4. The fix is available across all distribution types.

Credits

We thank Mikołaj Dąbek and Kamil Solecki for the responsible vulnerability report.

More about the coordinated vulnerability disclosure process at CERT Polska can be found at https://cert.pl/en/cvd/.