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CVE-2026-9353

A security vulnerability has been detected in NousResearch hermes-agent up to 2026.4.23. Impacted is an unknown function of the file agent/skills_guard.py of the component Skills Guard Multi-Word Prompt Handler. The manipulation of the argument THREAT_PATTERNS leads to injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:46cdc647277387f8ac115eef5cdc2ec6a477b393393de07730cb9c6a5b5d599e
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"baseScore":7.5,"vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/metrics/3/cvssV2_0

{"metric":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/metrics/0/cvssV4_0
cwe · 2 assertions

{"cweId":"CWE-707","description":"Improper Neutralization","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-74","description":"Injection","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:nousresearch:hermes-agent:*:*:*:*:*:*:*:*"],"modules":["Skills Guard Multi-Word Prompt Handler"],"product":"hermes-agent","vendor":"NousResearch","versions":[{"status":"affected","version":"2026.4.0"},{"status":"affected","version":"2026.4.1"},{"status":"affected","version":"2026.4.2"},{"status":"affected","version":"2026.4.3"},{"status":"affected","version":"2026.4.4"},{"status":"affected","version":"2026.4.5"},{"status":"affected","version":"2026.4.6"},{"status":"affected","version":"2026.4.7"},{"status":"affected","version":"2026.4.8"},{"status":"affected","version":"202…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"baseScore":7.5,"vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/metrics/3/cvssV2_0
{"metric":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-707","description":"Improper Neutralization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-74","description":"Injection","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"tags":["exploit"],"url":"https://gist.github.com/YLChen-007/82a3539d6358842e69dfaef0a9fcf14a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/references/3
{"name":"Submit #812216 | NousResearch hermes-agent 2026.4.23 Injection (CWE-74)","tags":["third-party-advisory"],"url":"https://vuldb.com/submit/812216"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/references/2
{"name":"VDB-365316 | NousResearch hermes-agent Skills Guard Multi-Word Prompt skills_guard.py injection","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/vuln/365316"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/references/0
{"name":"VDB-365316 | CTI Indicators (IOB, IOC, TTP, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/vuln/365316/cti"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:53f28bd349ee811c112e84413d2ee7404f688e843ff4733f7ca3f9af804a0571 · sha256:5cdeecbe9467b01a… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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