ALPINE-CVE-2026-55200

See a problem?
Please try reporting it to the source first.
Source
https://security.alpinelinux.org/vuln/CVE-2026-55200
Import Source
https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-55200.json
JSON Data
https://api.osv.dev/v1/vulns/ALPINE-CVE-2026-55200
Upstream
  • CVE-2026-55200
Published
2026-06-17T20:17:28.667Z
Modified
2026-06-27T10:30:17.462521367Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

libssh2 through 1.11.1, fixed in commit 7acf3df contains an out-of-bounds write vulnerability in ssh2transportread() that fails to enforce upper bounds on packetlength field. Remote attackers can send crafted SSH packets with excessively large packetlength values to corrupt heap memory and achieve remote code execution.

References

Affected packages

Alpine:v3.21 / libssh2

Package

Name
libssh2
Purl
pkg:apk/alpine/libssh2?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.11.1-r2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-55200.json"

Alpine:v3.22 / libssh2

Package

Name
libssh2
Purl
pkg:apk/alpine/libssh2?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.11.1-r2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-55200.json"

Alpine:v3.23 / libssh2

Package

Name
libssh2
Purl
pkg:apk/alpine/libssh2?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.11.1-r3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-55200.json"

Alpine:v3.24 / libssh2

Package

Name
libssh2
Purl
pkg:apk/alpine/libssh2?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.11.1-r3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-55200.json"