Vulnerability-Lookup

GHSA-9V83-JVH5-6GH3

Vulnerability from github – Published: 2026-06-16 21:32 – Updated: 2026-06-16 21:32

Details

In ServerCo getssl version 2.49 and prior, the ACME challenge token returned to the client was not strictly validated against RFC 8555 before being used in challenge-file handling, allowing a maliciously crafted token to influence local path/filename usage during validation. An attacker who can supply ACME challenge responses to getssl (for example, a malicious or compromised CA endpoint, or an on-path adversary able to tamper with that response path) could exploit this to achieve unauthorized file write/path traversal effects, usually with elevated privileges, ultimately allowing for remote command injection. This issue appears related in spirit to CVE-2023-38198, and is an instance of CWE-73, "External control of file name or path." Other ACME shell script handlers may be affected by similar issues.

Severity

7.4 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-10303"
  ],
  "database_specific": {
    "cwe_ids": [
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-16T20:16:26Z",
    "severity": "HIGH"
  },
  "details": "In ServerCo getssl version 2.49 and prior, the ACME challenge token returned to the client was not strictly validated against RFC 8555 before being used in challenge-file handling, allowing a maliciously crafted token to influence local path/filename usage during validation. An attacker who can supply ACME challenge responses to getssl (for example, a malicious or compromised CA endpoint, or an on-path adversary able to tamper with that response path) could exploit this to achieve unauthorized file write/path traversal effects, usually with elevated privileges, ultimately allowing for remote command injection. This issue appears related in spirit to CVE-2023-38198, and is an instance of CWE-73, \"External control of file name or path.\" Other ACME shell script handlers may be affected by similar issues.",
  "id": "GHSA-9v83-jvh5-6gh3",
  "modified": "2026-06-16T21:32:01Z",
  "published": "2026-06-16T21:32:01Z",
  "references": [
    {
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-10303"
    },
    {
      "type": "WEB",
      "url": "https://github.com/srvrco/getssl/pull/896"
    },
    {
      "type": "WEB",
      "url": "https://github.com/srvrco/getssl/releases/tag/v2.50"
    },
    {
      "type": "WEB",
      "url": "https://remyhax.xyz/posts/reproducing-lawful-tls-wiretapping"
    },
    {
      "type": "WEB",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-38198"
    },
    {
      "type": "WEB",
      "url": "https://www.runzero.com/advisories/serverco-getssl-acme-cmd-injection-cve-2026-10303"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
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      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-10303 (GCVE-0-2026-10303)

Vulnerability from cvelistv5 – Published: 2026-06-16 18:24 – Updated: 2026-06-17 15:18

Title

ServerCo getssl ACME shell script path injection

Summary

Severity

7.4 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-73 - External control of file name or path

Assigner

runZero

References

5 references

URL	Tags
https://github.com/srvrco/getssl/pull/896	mitigation
https://remyhax.xyz/posts/reproducing-lawful-tls-…	related
https://www.cve.org/CVERecord?id=CVE-2023-38198	related
https://www.runzero.com/advisories/serverco-getss…	third-party-advisory
https://github.com/srvrco/getssl/releases/tag/v2.50	release-notes

Impacted products

1 product

Vendor	Product	Version
ServerCo	getssl	Affected: 0 , ≤ 2.49 (custom)

Date Public

2026-06-16 18:20

Credits

remy Tod Beardsley of runZero

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-9V83-JVH5-6GH3

CVE-2026-10303 (GCVE-0-2026-10303)

Tags

Sightings

Nomenclature