CVE-2022-26691

CVE-2022-26691 is a privilege-escalation issue in the CUPS printing system caused by a logic error in local authorization. Connected documentation shows affected packages across multiple distributions and versions, with patches released: e.g., cups

CVE-2023-4504

CVE-2023-4504 affects the OpenPrinting CUPS stack and its libppd component, caused by a failure to validate the length of an attacker-crafted PPD PostScript document. This leads to a heap-based buffer overflow, with potential for code execution as described in the fixed release notes. The vulnera...

CVE-2023-32324

OpenPrinting CUPS (up to version 2.4.2 and earlier) contains a heap buffer overflow in format_log_line that can cause a DoS when cupsd.conf loglevel is set to DEBUG. The issue is exploitable remotely according to the CVE description, with impact limited to availability (DoS) and no confidentialit...

CVE-2025-58060

Summary: CVE-2025-58060 affects OpenPrinting CUPS and related package updates across Linux distributions, allowing authentication bypass when AuthType is not Basic but the request carries an Authorization: Basic header. The root cause is improper validation in cupsdAuthorize(), which can bypass p...

CVE-2026-34980

OpenPrinting CUPS (versions 2.4.16 and earlier) is impacted by CVE-2026-34980. In a network-exposed cupsd with a shared target queue, an unauthenticated client can submit a Print-Job, causing the server to process a text-within-PPD that leads to executing an attacker-chosen binary (e.g., /usr/bin...

CVE-2026-34990

In OpenPrinting CUPS versions 2.4.16 and prior , a local unprivileged user can coerce cupsd into authenticating to an attacker-controlled localhost IPP service using a reusable Authorization: Local ... token. This token permits unauthorized /admin/ requests on localhost. By combining this with CU...

CVE-2023-34241

CVE-2023-34241 (CUPS) affects OpenPrinting CUPS prior to 2.4.6. A use-after-free occurs in cupsdAcceptClient when logging data after a connection closes due to the function httpClose(con->http) freeing the pointer; cupsdLogClient then passes that freed pointer to httpGetHostname. This can happ...

CVE-2024-35235

CVE-2024-35235 affects OpenPrinting CUPS. Affects cupsd Listen directives using a symlink can trigger arbitrary chmod on the argument, giving world-writable access to the target and, on some configurations (e.g., Ubuntu AppArmor), potentially full root command execution via cups-files.conf User/G...

CVE-2026-34978

OpenPrinting CUPS vulnerability CVE-2026-34978 involves a path traversal flaw in the RSS notifier (notify-recipient-uri) that affects versions

CVE-2026-107886

OpenPrinting CUPS before version 2.4.20 is vulnerable to a double-free memory error in printer-class management. When the add_class() function replaces an existing class member list, it frees pclass->printers without clearing the pointer; if subsequent validation fails, the dangling pointer is...

CVE-2026-39316

OpenPrinting CUPS contains a use-after-free in the cupsd scheduler when deleting temporary printers. In cupsdDeleteTemporaryPrinters(), cupsdDeletePrinter() is called without expiring subscriptions that reference the printer, leaving cupsd_subscription_t.dest as a dangling pointer to freed memor...

CVE-2025-58436

OpenPrinting CUPS (printing system) is affected by CVE-2025-58436 prior to version 2.4.15, where a slow client communicating with cupsd could cause the daemon to become unusable for other clients (DoS). The issue has been patched in 2.4.15; multiple advisories reference upgrading to a newer CUPS ...

CVE-2026-61702

The OpenPrinting CUPS system (prior to version 2.4.20 ) is vulnerable to a root-side banner file disclosure due to a path traversal flaw in scheduler/ipp.c. The copy_banner() function fails to properly sanitize the attacker-controlled IPP attributes-natural-language value used as a directory comp...

CVE-2026-55453

The OpenPrinting CUPS printing system is vulnerable to a status-line injection in the backend/ipp.c quote_string() function. Prior to version 2.4.20 , the function fails to properly sanitize carriage-return and line-feed characters in remote printer-controlled marker messages. An attacker can inj...

CVE-2026-55480

OpenPrinting CUPS versions prior to 2.4.20 are vulnerable to a symlink TOCTOU (Time-of-Check to Time-of-Use) attack due to the copy_model() function in scheduler/ipp.c . The root cause is the creation of a predictable PPD tempfile path in an lp-group-writable directory without using O_EXCL or O_N...

CVE-2025-58364

OpenPrinting CUPS (versions ≤ 2.4.12) contains a vulnerability where unsafe deserialization/validation of printer attributes leads to a null dereference in libcups, causing remote DoS. Several connected advisories corroborate this, noting local-network exposure in default configurations and that ...

CVE-2026-27447

OpenPrinting CUPS (cupsd) contains an authorization bypass in versions 2.4.16 and earlier due to case-insensitive username comparison during authorization checks. This allows an unprivileged user to access restricted operations by using a username that differs only in case from an authorized user...

CVE-2026-107888

OpenPrinting CUPS versions before 2.4.20 are vulnerable to a NULL pointer dereference in the cupsdCheckJobs() function. The issue occurs when a job marked job-held-on-create refers to a temporary printer that has been automatically deleted. Because cleanup removes the destination without cancelin...

CVE-2025-61915

CVE-2025-61915 affects OpenPrinting CUPS. A user in the lpadmin group can use the cups web UI to alter cupsd.conf, which the root-running cupsd then parses, causing an out-of-bounds write. Impact exists locally (privileges required: HIGH) with potential DoS/compromised availability; patched in ve...

CVE-2026-39314

OpenPrinting CUPS (CVE-2026-39314) is vulnerable in versions 2.4.16 and prior. The root cause is an integer underflow in _ppdCreateFromIPP (cups/ppd-cache.c): a negative job-password-supported IPP attribute passes bounds checks, is cast to size_t, and is used as a length in memset() on a 33-byte ...

CVE-2026-107890

OpenPrinting CUPS before version 2.4.20 is vulnerable to a NULL pointer dereference caused by repeated Internet Printing Protocol (IPP ) group tags in job-creation requests. During IPP parsing, unnamed separator attributes with IPP_TAG_ZERO are created, but add_job() converts these to IPP_TAG_JOB...

CVE-2026-107885

OpenPrinting CUPS versions through 2.4.20 are vulnerable to a resource-exhaustion denial of service (DoS) flaw in the cupsdCheckJobs() function. The vulnerability exists because the scheduler globally suppresses timeout processing for all pending jobs whenever any client connection has an in-flig...

CVE-2026-41079

OpenPrinting CUPS (prior to 2.4.17) is vulnerable to a network-adjacent attacker who can send a crafted SNMP response to the CUPS SNMP backend, causing an out-of-bounds read of up to 176 bytes past a stack buffer. The leaked memory is interpreted from UTF-16 to UTF-8 and stored as printer supply ...

CVE-2026-55467

The OpenPrinting CUPS system (prior to version 2.4.20 ) is vulnerable to a control-character injection flaw in the cupsdCreateJob option-string builder located in scheduler/job.c. The destination-uri and pre-dial-string values from a configured fax queue are mapped to phone and faxPrefix options ...

CVE-2026-34979

OpenPrinting CUPS contains a heap-based buffer overflow in the CUPS scheduler’s get_options() when building filter option strings from job attributes, affecting versions 2.4.16 and earlier. The vulnerability is currently unpatched publicly at publication. The CVSS metrics indicate Network attack ...