CVE-2026-126767

MEDIUM 4.3

OpsTree REMS through 1.0.0 Prompt Injection via RCA Chat Assistant

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

OpsTree REMS through 1.0.0 contains a prompt injection vulnerability that allows authenticated users to disclose the hidden system prompt by submitting crafted chat input to POST /api/v1/rca/chat. Attackers can instruct the assistant to ignore its rules and reveal internal orchestration instructions, aiding the crafting of further prompt injection attacks.

CWE	CWE-1427
Vendor	opstree solutions
Product	rems
Published	Nov 11, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

OpsTree Solutions / REMS

0 ≤ 1.0.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

gist.github.com: https://gist.github.com/neelkotnis/548bfde3e45bc3793f3f26e1f9a43efe opstree.com: https://opstree.com/rems-ai-powered-observability/ vulncheck.com: https://www.vulncheck.com/advisories/opstree-rems-through-1.0.0-prompt-injection-via-rca-chat-assistant

Credits

Neel Saurabh Kotnis