CVE-2026-55086— Etherpad: Import/export use Math.random() for temp file paths; predictable paths on shared /tmp enable symlink-based file overwrite

Etherpad: Import/export use Math.random() for temp file paths; predictable paths on shared /tmp enable symlink-based file overwrite

Etherpad is a real-time collaborative editor. Prior to 3.1.0, src/node/handler/ImportHandler.ts and src/node/handler/ExportHandler.ts derive temporary filenames from Math.random() and place them in os.tmpdir(). On a host with a shared world-writable temporary directory, a local unprivileged attacker who predicts a filename can precreate a symbolic link to a file writable by the Etherpad process. Subsequent import or export operations can follow the link through fs.writeFile, fs.rename, or document-conversion output and overwrite the target with partially attacker-controlled content. This issue is fixed in version 3.1.0.

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N

在文件访问前对链接解析不恰当(链接跟随)

ETHER etherpad 资源管理错误漏洞

etherpad是ETHER组织的一个支持多人实时在线协作的文档编辑工具。 ETHER etherpad 3.1.0之前版本存在安全漏洞，该漏洞源于src/node/handler/ImportHandler.ts和src/node/handler/ExportHandler.ts使用Math.random()生成临时文件名并放在共享可写临时目录中，本地无特权攻击者预测文件名后可预创建符号链接，使后续导入或导出操作通过fs.writeFile、fs.rename或文档转换输出覆盖Etherpad进程可写的

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