CVE-2026-55378

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Source
https://cve.org/CVERecord?id=CVE-2026-55378
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55378.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55378
Aliases
  • GHSA-w9cj-mg3x-qjm4
Published
2026-08-28T18:15:41.125Z
Modified
2026-08-30T03:46:40.439117551Z
Severity
  • 9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
JS Recon: Command injection in PR Branch Checker workflow via untrusted pull request context values
Details

JS Recon is a JavaScript enumeration and SAST tool. From 1.2.1-beta.1 until 1.3.1-beta.2, the PR Branch Checker workflow in .github/workflows/prchecker.yml places github.headref and github.event.pullrequest.head.repo.fullname into BRANCHNAME and SOURCEREPO and interpolates those untrusted values into a shell gh pr comment command. A remote user who opens a pull request can use shell metacharacters in a branch or fork name to execute commands in the GitHub Actions runner with the workflow's GITHUB_TOKEN, which has pull-requests write permission. This issue is fixed in version 1.3.1-beta.2.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55378.json",
    "cwe_ids": [
        "CWE-78"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/js-recon/js-recon

Affected ranges

Type
GIT
Repo
https://github.com/js-recon/js-recon
Events
Introduced
9d239baf051f35833503276ef5a5b2d33196a542
Fixed
447876c4bfa9ec5bc98cbc65d7a3e5f889412491
Fixed
7470c2119339650bb798acf1247b594e17d4a214
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "1.2.1-beta.1"
        },
        {
            "fixed": "1.3.1-beta.2"
        }
    ]
}

Affected versions

v1.*
v1.2.1
v1.2.1-beta.1
v1.2.1-beta.2
v1.2.2
v1.2.2-alpha.1
v1.2.2-alpha.10
v1.2.2-alpha.11
v1.2.2-alpha.2
v1.2.2-alpha.3
v1.2.2-alpha.5
v1.2.2-alpha.6
v1.2.2-alpha.7
v1.2.2-alpha.8
v1.2.2-alpha.9
v1.3.1-alpha.1
v1.3.1-alpha.2
v1.3.1-alpha.3
v1.3.1-alpha.4
v1.3.1-beta.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55378.json"