CVE-2021-39156

high

Published 2021-08-30 · Modified 2026-03-13

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

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

CVSS v4 NEW

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not yet in upstream

VIR risk

8.0

Description

Istio Fragments in Path May Lead to Authorization Policy Bypass

Predictions

Exploit likelihood

30%

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
arch		fixed	`1.11.1-1`

Package impact

Ecosystem	Package	Vulnerable	Fixed
Go	istio.io/istio	`<1.9.8`	`1.9.8`
Go	istio.io/istio	`>=1.10.0,<1.10.4`	`1.10.4`
Go	istio.io/istio	`>=1.11.0,<1.11.1`	`1.11.1`

References

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

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