CVE-2026-55086

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-55086
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55086.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55086
Aliases
Published
2026-08-19T19:35:46Z
Modified
2026-10-21T02:58:36Z
Severity
  • 4.2 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N CVSS Calculator
Summary
Etherpad: Import/export use Math.random() for temp file paths; predictable paths on shared /tmp enable symlink-based file overwrite
Details

Etherpad is a real-time collaborative editor. Prior to 3.1.0, src/node/handler/ImportHandler.ts and src/node/handler/ExportHandler.ts derive temporary filenames from Math.random() and place them in os.tmpdir(). On a host with a shared world-writable temporary directory, a local unprivileged attacker who predicts a filename can precreate a symbolic link to a file writable by the Etherpad process. Subsequent import or export operations can follow the link through fs.writeFile, fs.rename, or document-conversion output and overwrite the target with partially attacker-controlled content. This issue is fixed in version 3.1.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-377",
        "CWE-59"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55086.json"
}
References

Affected packages

Git / github.com/ether/etherpad

Affected ranges

Type
GIT
Repo
https://github.com/ether/etherpad
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
fa1c6b2e43d0510c851643cb7ba67cf042331a37
Fixed
8c6104c5d5daf41f0d454acc04d42dffa0e0d996
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "3.1.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "8c6104c5d5daf41f0d454acc04d42dffa0e0d996"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v3.1.0",
            "range":  [
                {
                    "fixed":  "fa1c6b2e43d0510c851643cb7ba67cf042331a37"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

1.*
1.0
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
1.2.0
1.2.1
1.2.12
1.2.2
1.2.3
1.2.4
1.2.5
1.2.6
1.2.7
1.2.9
1.3.0
1.4.0
1.4.1
1.5.1
1.5.2
1.5.3
1.5.4
1.5.5
1.5.6
1.5.7
1.6.0
1.6.1
1.6.2
1.8.10
1.8.11
1.8.12
1.8.13
1.8.14
1.8.15
1.8.16
1.8.17
1.8.18
1.8.6
1.8.7
1.8.8
1.8.9
1.9.0
1.9.1
1.9.2
1.9.3
1.9.4
1.9.5
1.9.6
1.9.7
2.*
2.0.0
2.0.1
2.0.2
2.0.3
2.1.0
2.1.1
2.2.0
2.2.1
2.2.2
2.2.3
2.2.4
2.2.5
2.2.6
2.2.7
2.3.0
2.3.1
2.3.2
2.4.0
2.4.1
2.4.2
2.5.0
2.5.1
2.5.3
2.6.0
2.6.1
2.7.0
2.7.1
2.7.2
2.7.3
3.*
3.0.0
v1.*
v1.9.0
v1.9.1
v1.9.2
v1.9.3
v1.9.4
v1.9.5
v1.9.6
v1.9.7
v2.*
v2.0.0
v2.0.1
v2.0.2
v2.0.3
v2.1.0
v2.1.1
v2.2.0
v2.2.1
v2.2.2
v2.2.3
v2.2.4
v2.2.5
v2.2.6
v2.2.7
v2.3.0
v2.3.1
v2.3.2
v2.4.0
v2.4.1
v2.4.2
v2.5.0
v2.5.1
v2.5.3
v2.6.0
v2.6.1
v2.7.0
v2.7.1
v2.7.2
v2.7.3
v3.*
v3.0.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55086.json"