CVE-2026-43990
CVE-2026-43990 is a high-severity vulnerability with a CVSS 3.x base score of 8.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.
Key facts
- Severity: High (CVSS 3.x base score 8.4)
- EPSS exploit prediction: 0% (5th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-29539
- Weakness: CWE-77
- Published:
- Last modified:
Description
JunoClaw is an agentic AI platform built on Juno Network. Prior to 0.x.y-security-1, plugin-shell's run_command wrapped every agent-supplied command in 'sh -c' / 'cmd /C' and passed the full argument string to the shell's parser, allowing shell metacharacters in agent-supplied arguments to be interpreted as command syntax. This vulnerability is fixed in 0.x.y-security-1.
Frequently asked questions
- What is CVE-2026-43990?
- JunoClaw is an agentic AI platform built on Juno Network. Prior to 0.x.y-security-1, plugin-shell's run_command wrapped every agent-supplied command in 'sh -c' / 'cmd /C' and passed the full argument string to the shell's parser, allowing shell metacharacters in agent-supplied arguments to be interpreted as command syntax. This vulnerability is fixed in 0.x.y-security-1.
- How severe is CVE-2026-43990?
- CVE-2026-43990 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-43990 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-43990?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-43990 have an EU (EUVD) identifier?
- Yes. CVE-2026-43990 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-29539.
- When was CVE-2026-43990 published?
- CVE-2026-43990 was published on 2026-05-12 and last updated on 2026-06-17.
References
- https://github.com/Dragonmonk111/junoclaw/commit/2bc54f6
- https://github.com/Dragonmonk111/junoclaw/releases/tag/v0.x.y-security-1
- https://github.com/Dragonmonk111/junoclaw/security/advisories/GHSA-gpvm-3chf-2649
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