{"id":55146,"date":"2026-05-17T05:25:54","date_gmt":"2026-05-17T05:25:54","guid":{"rendered":"https:\/\/zero.redgem.net\/?p=55146"},"modified":"2026-05-17T05:25:54","modified_gmt":"2026-05-17T05:25:54","slug":"open5gs-amfmme-contextc-ranuefindbyamfuengapid-improper-authorization","status":"publish","type":"post","link":"https:\/\/zero.redgem.net\/?p=55146","title":{"rendered":"Open5GS AMF\/MME context.c ran_ue_find_by_amf_ue_ngap_id improper authorization_CVE-2026-8743"},"content":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;A vulnerability was found in Open5GS up to 2.7.6. This impacts the function ran_ue_find_by_amf_ue_ngap_id of the file src\/amf\/context.c of the component AMF\/MME. Performing a manipulation results in improper authorization. It is possible to initiate the attack remotely. The exploit has been made public and could be used. The patch is named 5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1. It is suggested to install a patch to address this issue.&#8221;,&#8221;published&#8221;:&#8221;2026-05-17T09:00:13.637Z&#8221;,&#8221;modified&#8221;:&#8221;2026-05-17T09:00:13.637Z&#8221;,&#8221;type&#8221;:&#8221;cve&#8221;,&#8221;title&#8221;:&#8221;Open5GS AMF\/MME context.c ran_ue_find_by_amf_ue_ngap_id improper authorization&#8221;,&#8221;source&#8221;:&#8221;VulDB&#8221;,&#8221;references&#8221;:&#8221;https:\/\/vuldb.com\/vuln\/364330\\nhttps:\/\/vuldb.com\/vuln\/364330\/cti\\nhttps:\/\/vuldb.com\/submit\/814559\\nhttps:\/\/github.com\/open5gs\/open5gs\/issues\/4498\\nhttps:\/\/github.com\/open5gs\/open5gs\/pull\/4553\\nhttps:\/\/github.com\/open5gs\/open5gs\/commit\/5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1\\nhttps:\/\/github.com\/open5gs\/open5gs\/&#8221;,&#8221;id&#8221;:&#8221;CVE-2026-8743&#8243;,&#8221;bulletinFamily&#8221;:&#8221;&#8221;,&#8221;cwe&#8221;:[&#8220;CWE-285&#8243;,&#8221;CWE-266&#8243;],&#8221;cvelist&#8221;:null,&#8221;sourceData&#8221;:&#8221;n\/a Open5GS 2.7.0\\nn\/a Open5GS 2.7.1\\nn\/a Open5GS 2.7.2\\nn\/a Open5GS 2.7.3\\nn\/a Open5GS 2.7.4\\nn\/a Open5GS 2.7.5\\nn\/a Open5GS 2.7.6&#8243;,&#8221;sourceHref&#8221;:&#8221;&#8221;,&#8221;cvss&#8221;:{&#8220;score&#8221;:5.3,&#8221;severity&#8221;:&#8221;MEDIUM&#8221;,&#8221;vector&#8221;:&#8221;CVSS:4.0\/AV:N\/AC:L\/AT:N\/PR:L\/UI:N\/VC:L\/VI:L\/VA:L\/SC:N\/SI:N\/SA:N\/E:P&#8221;,&#8221;version&#8221;:&#8221;4.0&#8243;},&#8221;cvss2&#8243;:{},&#8221;cvss3&#8243;:{&#8220;version&#8221;:&#8221;&#8221;,&#8221;vectorString&#8221;:&#8221;&#8221;,&#8221;baseScore&#8221;:0,&#8221;baseSeverity&#8221;:&#8221;&#8221;,&#8221;attackVector&#8221;:&#8221;&#8221;,&#8221;attackComplexity&#8221;:&#8221;&#8221;,&#8221;privilegesRequired&#8221;:&#8221;&#8221;,&#8221;userInteraction&#8221;:&#8221;&#8221;,&#8221;scope&#8221;:&#8221;&#8221;,&#8221;confidentialityImpact&#8221;:&#8221;&#8221;,&#8221;integrityImpact&#8221;:&#8221;&#8221;,&#8221;availabilityImpact&#8221;:&#8221;&#8221;,&#8221;cvssV3&#8243;:{&#8220;version&#8221;:&#8221;&#8221;,&#8221;vectorString&#8221;:&#8221;&#8221;,&#8221;baseScore&#8221;:0,&#8221;baseSeverity&#8221;:&#8221;&#8221;,&#8221;attackVector&#8221;:&#8221;&#8221;,&#8221;attackComplexity&#8221;:&#8221;&#8221;,&#8221;privilegesRequired&#8221;:&#8221;&#8221;,&#8221;userInteraction&#8221;:&#8221;&#8221;,&#8221;scope&#8221;:&#8221;&#8221;,&#8221;confidentialityImpact&#8221;:&#8221;&#8221;,&#8221;integrityImpact&#8221;:&#8221;&#8221;,&#8221;availabilityImpact&#8221;:&#8221;&#8221;}},&#8221;href&#8221;:&#8221;&#8221;,&#8221;category_name&#8221;:&#8221;CVE&#8221;,&#8221;post_link&#8221;:&#8221;&#8221;,&#8221;product&#8221;:&#8221;Open5GS&#8221;,&#8221;version&#8221;:&#8221;2.7.0&#8243;,&#8221;vendor&#8221;:&#8221;n\/a&#8221;,&#8221;ai_description&#8221;:&#8221;&#8221;,&#8221;ai_severity&#8221;:&#8221;&#8221;,&#8221;ai_vendor&#8221;:&#8221;&#8221;,&#8221;ai_product&#8221;:&#8221;&#8221;,&#8221;ai_version&#8221;:&#8221;&#8221;,&#8221;ai_score&#8221;:0}<\/p>\n","protected":false},"excerpt":{"rendered":"<p>{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;A vulnerability was found in Open5GS up to 2.7.6. This impacts the function ran_ue_find_by_amf_ue_ngap_id of the file src\/amf\/context.c of the component AMF\/MME. Performing a manipulation&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[6,8,22,12,21,13,7,11,5],"class_list":["post-55146","post","type-post","status-publish","format-standard","hentry","category-category_cve","tag-cve","tag-cvss","tag-cvss-53","tag-exploit","tag-medium","tag-news","tag-security","tag-tapic","tag-vulnerability"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Open5GS AMF\/MME context.c ran_ue_find_by_amf_ue_ngap_id improper authorization_CVE-2026-8743 - zero redgem<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/zero.redgem.net\/?p=55146\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Open5GS AMF\/MME context.c ran_ue_find_by_amf_ue_ngap_id improper authorization_CVE-2026-8743 - zero redgem\" \/>\n<meta property=\"og:description\" content=\"{&#8220;lastseen&#8221;:&#8221;&#8221;,&#8221;description&#8221;:&#8221;A vulnerability was found in Open5GS up to 2.7.6. 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