CVE-2026-4430— Heap Buffer Overflow in AgileEngine
Quick assessment
Affected
The Document Foundation LibreOffice
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.
LibreOffice是The Document基金会的一套开源的办公软件套件。 LibreOffice 26.2版本至26.2.3之前版本和25.8版本至25.8.7之前版本存在缓冲区错误漏洞，该漏洞源于处理加密盐参数不匹配的特制OOXML文档时存在越界写入。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1203 · Exploitation for Client ExecutionAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| The Document Foundation | LibreOffice | 26.2< 26.2.3 |
affected |
25.8< 25.8.7 |
affected |
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I. Basic Information for CVE-2026-4430
Vulnerability Information
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Vulnerability Title
Heap Buffer Overflow in AgileEngine
Source: CVE Program / CVE List V5
Vulnerability Description
Out-of-bounds write vulnerability in The Document Foundation LibreOffice via crafted OOXML documents with mismatched encryption salt parameters.
This issue affects LibreOffice: from 26.2 before 26.2.3, from 25.8 before 25.8.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
LibreOffice 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LibreOffice是The Document基金会的一套开源的办公软件套件。 LibreOffice 26.2版本至26.2.3之前版本和25.8版本至25.8.7之前版本存在缓冲区错误漏洞，该漏洞源于处理加密盐参数不匹配的特制OOXML文档时存在越界写入。
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 |
|---|---|---|---|---|
| The Document Foundation | LibreOffice | 26.2 ~ 26.2.3 | - |
|
II. Public POCs for CVE-2026-4430
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-4430 (1)
IV. Related Vulnerabilities
Same product: LibreOffice
-
CVE-2026-63279
Out of bounds read in PICT image import -
CVE-2026-63278
Package URLs can be used to exfiltrate arbitrary INI file va -
CVE-2026-63276
Stack buffer overflow in CFF to Type 1 font conversion -
CVE-2026-63275
Stack buffer overflow in CFF font hint handling -
CVE-2026-63274
Heap buffer overflow in PDF import stream handling
Same vendor: The Document Foundation
-
CVE-2026-63279
Out of bounds read in PICT image import -
CVE-2026-63278
Package URLs can be used to exfiltrate arbitrary INI file va -
CVE-2026-63276
Stack buffer overflow in CFF to Type 1 font conversion -
CVE-2026-63275
Stack buffer overflow in CFF font hint handling -
CVE-2026-63274
Heap buffer overflow in PDF import stream handling
Same weakness: CWE-787
-
CVE-2026-103628
Chrome<154.0.8037.97 WebGL越界写入漏洞 -
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Out-of-bounds write in PeaZip PEA extractor allows code exec -
CVE-2026-103484
pgvector buffer overflow in IVFFlat index build -
CVE-2026-59685
Apache HTTP Server: Out-of-Bounds Write in ap_directory_walk -
CVE-2026-56449
Apache HTTP Server: mod_proxy_html: crash in dump_content
V. Comments for CVE-2026-4430
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