{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/tags/cryptographic-vulnerability/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[{"cvss":8.1,"id":"CVE-2026-11348"}],"_cs_exploited":true,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["Liman MYS: \u003c release.Master.1107"],"_cs_severities":["high"],"_cs_tags":["vulnerability","cryptographic-vulnerability","liman-mys"],"_cs_type":"threat","_cs_vendors":["HAVELSAN Inc."],"content_html":"\u003cp\u003eA significant vulnerability, CVE-2026-11348, has been identified in HAVELSAN Inc.'s Liman MYS product. This flaw stems from an improper verification of cryptographic signatures, which an attacker can exploit to fake the origin of data. The vulnerability, first disclosed by the Computer Emergency Response Team of the Republic of Turkey, impacts all versions of Liman MYS released prior to \u003ccode\u003erelease.Master.1107\u003c/code\u003e. While specific details of in-the-wild exploitation are not yet public, such a vulnerability allows malicious actors to potentially inject falsified information into systems or bypass authentication mechanisms that rely on cryptographic signatures. This could lead to data manipulation, unauthorized access, or other integrity compromises within environments utilizing Liman MYS.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003e\u003cstrong\u003eAttacker Crafts Malicious Data\u003c/strong\u003e: An unauthenticated attacker creates data intended to be malicious (e.g., altered configuration, spoofed commands, or falsified reports).\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eAttacker Forges Cryptographic Signature\u003c/strong\u003e: The attacker generates a cryptographic signature for the malicious data that appears legitimate but is actually forged.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eAttacker Submits Crafted Payload\u003c/strong\u003e: The attacker sends the malicious data bundle, including the forged signature, to a vulnerable HAVELSAN Liman MYS instance.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eLiman MYS Processes Incoming Data\u003c/strong\u003e: The application receives the data and attempts to validate its authenticity by verifying the accompanying cryptographic signature.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eSignature Verification Bypass (CVE-2026-11348)\u003c/strong\u003e: Due to the inherent flaw in the signature verification logic (CWE-347), Liman MYS fails to correctly identify the forged signature as invalid.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eData Accepted as Legitimate\u003c/strong\u003e: The Liman MYS application mistakenly authenticates and accepts the malicious data as originating from a trusted or authorized source.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eApplication Processes Faked Data\u003c/strong\u003e: The application proceeds to process the attacker-controlled data, believing it to be genuine and reliable.\u003c/li\u003e\n\u003cli\u003e\u003cstrong\u003eImpact Realized\u003c/strong\u003e: The faked data is then integrated into the system, leading to consequences such as data integrity compromise, execution of unauthorized commands, or other logical abuses depending on the attacker's specific objective.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eThis vulnerability allows an attacker to \u0026quot;fake the source of data,\u0026quot; meaning they can potentially inject arbitrary malicious information into the Liman MYS system, bypass integrity checks, or spoof legitimate entities. The CVSS v3.1 base score of 8.1 (High) indicates significant potential for impact, including high confidentiality, integrity, and availability impacts, if successfully exploited. Organizations using affected versions of HAVELSAN Liman MYS could face data corruption, unauthorized system behavior, or loss of trust in the data managed by the platform. Without immediate patching, affected systems remain vulnerable to external manipulation, potentially impacting operational reliability and security.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003ePatch CVE-2026-11348 immediately by updating HAVELSAN Liman MYS to \u003ccode\u003erelease.Master.1107\u003c/code\u003e or a newer version as advised by the vendor.\u003c/li\u003e\n\u003cli\u003eReview the vendor advisory at \u003ca href=\"https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0504\"\u003ehttps://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0504\u003c/a\u003e for further guidance and details on the patch.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-07-07T12:25:00Z","date_published":"2026-07-07T12:25:00Z","id":"https://feed.craftedsignal.io/briefs/2026-07-cve-2026-11348-liman-mys-signature-bypass/","summary":"A critical improper verification of cryptographic signature vulnerability, tracked as CVE-2026-11348, in HAVELSAN Inc.'s Liman MYS product allows an unauthenticated attacker to fake the source of data, leading to potential data integrity compromise.","title":"CVE-2026-11348: HAVELSAN Liman MYS Cryptographic Signature Bypass Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-07-cve-2026-11348-liman-mys-signature-bypass/"}],"language":"en","title":"CraftedSignal Threat Feed - Cryptographic-Vulnerability","version":"https://jsonfeed.org/version/1.1"}