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CVE-2026-18929— Resource Exhaustion in Carbone

Quick assessment

Affected
Carbone Carbone
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

CarboneIO carbone是CarboneIO公司开源的一个报告生成器。 CarboneIO carbone 3.8.2之前版本、4.26.3之前版本和5.4.4之前版本存在资源管理错误漏洞，该漏洞源于使用yazl进行zip解压时未验证条目大小，缺乏对zip炸弹的防护，导致处理恶意.docx文件时解压后数据量过大，造成内存过度消耗，可能导致拒绝服务。

CVSS 6.9 · Medium EPSS 0.52% · P42

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 3

VendorProduct Version RangeStatus
Carbone Carbone < 3.8.2 affected
< 4.26.3 affected
< 5.4.4 affected
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I. Basic Information for CVE-2026-18929

Vulnerability Information
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Vulnerability Title
Resource Exhaustion in Carbone
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
对高度压缩数据的处理不恰当(数据放大攻击)
Source: CVE Program / CVE List V5
Vulnerability Title
CarboneIO carbone 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
CarboneIO carbone是CarboneIO公司开源的一个报告生成器。 CarboneIO carbone 3.8.2之前版本、4.26.3之前版本和5.4.4之前版本存在资源管理错误漏洞，该漏洞源于使用yazl进行zip解压时未验证条目大小，缺乏对zip炸弹的防护，导致处理恶意.docx文件时解压后数据量过大，造成内存过度消耗，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Carbone Carbone 0 ~ 3.8.2 -

II. Public POCs for CVE-2026-18929

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III. Intelligence Information for CVE-2026-18929

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Patches & Fixes for CVE-2026-18929 (1)

Security Blog Posts for CVE-2026-18929 (1)

Vendor Pages for CVE-2026-18929 (1)

IV. Related Vulnerabilities

Same product: Carbone
Same weakness: CWE-409

V. Comments for CVE-2026-18929

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