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CVE-2026-55199

🗓️ 17 Jun 2026 20:17:00Reported by ubuntu.comType 
ubuntucve
 ubuntucve
🔗 ubuntu.com👁 4 Views

Pre-authentication DoS in libssh2 1.11.1 via SSH_EXT_INFO; 0xFFFFFFFF extensions cause CPU spin over 60 seconds.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
githubexploit
GithubExploit
Exploitarium-Detections
28 Jun 202621:36
githubexploit
alpinelinux
AlpineLinux
CVE-2026-55199
17 Jun 202618:44
alpinelinux
ibm
IBM Security Bulletins
Security Bulletin: Multiple vulnerabilities in IBM Aspera HTTP Gateway
3 Aug 202622:05
ibm
cbl_mariner
CBLMariner
CVE-2026-55199 affecting package libssh2 for versions less than 1.11.1-4
8 Jul 202616:02
cbl_mariner
cgr
Chainguard
CVE-2026-55199 vulnerabilities
14 Jul 202614:17
cgr
circl
Circl
CVE-2026-55199
17 Jun 202622:46
circl
cve
CVE
CVE-2026-55199
17 Jun 202618:44
cve
cvelist
Cvelist
CVE-2026-55199 libssh2 - Pre-Authentication DoS via SSH_MSG_EXT_INFO Handler
17 Jun 202618:44
cvelist
debian
Debian
[SECURITY] [DSA 6365-1] libssh2 security update
25 Jun 202618:20
debian
debiancve
Debian CVE
CVE-2026-55199
17 Jun 202618:44
debiancve
Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Ubuntu14.04alllibssh20libssh2_0_all.deb
Ubuntu18.04alllibssh20libssh2_0_all.deb
Ubuntu20.04alllibssh20libssh2_0_all.deb
Ubuntu22.04alllibssh20libssh2_0_all.deb
Ubuntu24.04alllibssh21.11.0-4.1ubuntu0.24.04.2libssh2_1.11.0-4.1ubuntu0.24.04.2_all.deb
Ubuntu25.10alllibssh21.11.1-1ubuntu0.25.10.2libssh2_1.11.1-1ubuntu0.25.10.2_all.deb
Ubuntu26.04alllibssh21.11.1-1ubuntu0.26.04.2libssh2_1.11.1-1ubuntu0.26.04.2_all.deb

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30 Jun 2026 18:58Current
7High risk
Vulners AI Score7
CVSS 3.15.9 - 7.5
CVSS 48.2
EPSS0.00918
SSVC
4