{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-55453 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-55453 is a low-severity command injection vulnerability in OpenPrinting cups, published on 15 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-55453 and fix it if it is affected.\n\nWhat it is: CVE-2026-55453 is a low-severity command injection vulnerability in OpenPrinting cups, published on 15 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-55453 in the wild and no public exploit code.\n\nAffected product: OpenPrinting cups. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-55453/ (Markdown: https://insights.sbomify.com/CVE-2026-55453/index.md)","id":"CVE-2026-55453","markdown":"https://insights.sbomify.com/CVE-2026-55453/index.md","name":"CVE-2026-55453","record":{"aliases":["AZL-108287","BELL-CVE-2026-55453","CLSA-2026-1792768682","CLSA-2026-1792768763","DEBIAN-CVE-2026-55453","ECHO-e4db-2416-74ec","GHSA-7hqf-mfhx-7r3v","UBUNTU-CVE-2026-55453"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"CUPS printing system","requires_auth":"none","summary":"Remote attackers can inject newlines into IPP responses to modify PPD settings, leading to command execution as the lp user via Foomatic filters.","user_interaction":"required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"cups","vendor":"openprinting"}],"cvss":{"score":3.3,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"},{"id":"CWE-77","name":"Improper Neutralization of Special Elements used in a Command"},{"id":"CWE-74","name":"Improper Neutralization of Special Elements in Output Used by a Downstream Component"}],"description":"OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, the backend/ipp.c quote_string() function preserves carriage-return and line-feed characters in a remote printer-controlled marker-message before report_attr() writes the value to the scheduler status stream. The scheduler can parse an injected newline as a separate PPD: control line and persist an attacker-selected PPD keyword. The reporter demonstrated that a later print job on a Foomatic-backed queue could consume an injected FoomaticRIPCommandLine value and execute in the filter context as lp. This issue is fixed in version 2.4.20.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"CUPS ipp backend status-line injection can update queue PPD and lead to conditional RCE as lp via foomatic-rip","id":"CVE-2026-55453","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"command_injection","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"Appsmith: Caddy admin API exposed without authentication","id":"CVE-2026-55454"},"packages":[],"prev":{"headline":"Snipe-IT: CSV formula injection in Activity Report export","id":"CVE-2026-55452"},"products":["cups"],"published":"2026-10-15","related":[{"cvss_score":8,"headline":"cups has Authentication bypass with AuthType Negotiate","id":"CVE-2025-58060","kev_date_added":null,"published":"2025-09-11"},{"cvss_score":6.5,"headline":"Path traversal in cups","id":"CVE-2026-34978","kev_date_added":null,"published":"2026-04-03"},{"cvss_score":6.5,"headline":"cups: Remote DoS via null dereference","id":"CVE-2025-58364","kev_date_added":null,"published":"2025-09-11"},{"cvss_score":6.1,"headline":"OpenPrinting CUPS: Shared PostScript queue lets anonymous Print-Job requests reach `lp` code execution over the network","id":"CVE-2026-34980","kev_date_added":null,"published":"2026-04-03"},{"cvss_score":6,"headline":"OpenPrinting CUPS vulnerable to stack based out-of-bound write","id":"CVE-2025-61915","kev_date_added":null,"published":"2025-11-29"},{"cvss_score":5.7,"headline":"CUPS copy_model() creates a predictable PPD tempfile without O_EXCL/O_NOFOLLOW (symlink TOCTOU, lp → root)","id":"CVE-2026-55480","kev_date_added":null,"published":"2026-10-15"},{"cvss_score":5.3,"headline":"OpenPrinting CUPS: root-side banner file disclosure","id":"CVE-2026-61702","kev_date_added":null,"published":"2026-10-15"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-16","vendors":["OpenPrinting"]},"summary":"Remote attackers can inject newlines into IPP responses to modify PPD settings, leading to command execution as the lp user via Foomatic filters.","url":"https://insights.sbomify.com/CVE-2026-55453/"}