CVE-2023-47090

unknown

Published 2023-10-19 · Modified 2026-02-04

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

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Description

NATS nats-server before 2.9.23 and 2.10.x before 2.10.2 has an authentication bypass. An implicit $G user in an authorization block can sometimes be used for unauthenticated access, even when the intention of the configuration was for each user to have an account. The earliest affected version is 2.2.0.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

OS	Version	Status	Fixed in
debian	bookworm	affected
debian	forky	fixed	`2.10.3-1`
debian	sid	fixed	`2.10.3-1`
debian	trixie	fixed	`2.10.3-1`

Package impact

Ecosystem	Package	Vulnerable	Fixed
Go	github.com/nats-io/nats-server/v2	`>=2.2.0,<2.9.23`	`2.9.23`
Go	github.com/nats-io/nats-server/v2	`>=2.10.0,<2.10.2`	`2.10.2`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.