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CVE-2026-34980— OpenPrinting CUPS: Shared PostScript queue lets anonymous Print-Job requests reach `lp` code execution over the network

Quick assessment

Affected
OpenPrinting cups
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.

OpenPrinting CUPS是OpenPrinting公司的一个适用于 Linux® 和其他类 Unix® 操作系统的基于标准的开源打印系统。 OpenPrinting CUPS 2.4.16及之前版本存在输入验证错误漏洞，该漏洞源于在具有共享目标队列的网络暴露cupsd中，未经授权的客户端可以向共享PostScript队列发送Print-Job，可能导致服务器执行攻击者选择的现有二进制文件。

AI Predicted 9.8 Difficulty: Easy EPSS 0.34% · P25
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I. Basic Information for CVE-2026-34980

Vulnerability Information
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Vulnerability Title
OpenPrinting CUPS: Shared PostScript queue lets anonymous Print-Job requests reach `lp` code execution over the network
Source: CVE Program / CVE List V5
Vulnerability Description
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, in a network-exposed cupsd with a shared target queue, an unauthorized client can send a Print-Job to that shared PostScript queue without authentication. The server accepts a page-border value supplied as textWithoutLanguage, preserves an embedded newline through option escaping and reparse, and then reparses the resulting second-line PPD: text as a trusted scheduler control record. A follow-up raw print job can therefore make the server execute an attacker-chosen existing binary such as /usr/bin/vim as lp. At time of publication, there are no publicly available patches.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
OpenPrinting CUPS 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenPrinting CUPS是OpenPrinting公司的一个适用于 Linux® 和其他类 Unix® 操作系统的基于标准的开源打印系统。 OpenPrinting CUPS 2.4.16及之前版本存在输入验证错误漏洞，该漏洞源于在具有共享目标队列的网络暴露cupsd中，未经授权的客户端可以向共享PostScript队列发送Print-Job，可能导致服务器执行攻击者选择的现有二进制文件。
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
OpenPrinting cups <= 2.4.16 -

II. Public POCs for CVE-2026-34980

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III. Intelligence Information for CVE-2026-34980

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Vendor Advisories for CVE-2026-34980 (1)

Same Patch Batch · OpenPrinting · 2026-04-03 · 5 CVEs total

CVE-2026-34978 6.5 MEDIUM OpenPrinting CUPS: Path traversal in RSS notify-recipient-uri enables file write outside C
CVE-2026-34979 5.3 MEDIUM OpenPrinting CUPS: Heap overflow in `get_options()`
CVE-2026-27447 4.8 MEDIUM OpenPrinting CUPS: Authorization bypass via case-insensitive group-member lookup
CVE-2026-34990 OpenPrinting CUPS: Local print admin token disclosure using temporary printers

IV. Related Vulnerabilities

Same product: cups
Same vendor: OpenPrinting
Same weakness: CWE-20

V. Comments for CVE-2026-34980

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