CVE-2026-33551

unknown

Published 2026-04-10 · Modified 2026-04-10

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CVSS v3

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

CVSS v4 NEW

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not yet in upstream

VIR risk

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Description

An issue was discovered in OpenStack Keystone 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0. Restricted application credentials can create EC2 credentials. By using a restricted application credential to call the EC2 credential creation API, an authenticated user with only a reader role may obtain an EC2/S3 credential that carries the full set of the parent user's S3 permissions, effectively bypassing the role restrictions imposed on the application credential. Only deployments that use restricted application credentials in combination with the EC2/S3 compatibility API (swift3 / s3api) are affected.

Predictions

Exploit likelihood

30%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Debian Security Tracker · View original ↗ · DFSG

CVE-2026-33551 NameCVE-2026-33551 DescriptionAn issue was discovered in OpenStack Keystone 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0. Restricted application credentials can create EC2 credentials. By using a restricted application credential to call the EC2 credential creation API, an authenticated user with only a reader role may obtain an EC2/S3 credential that carries the full…

CVE-2026-33551

Name	CVE-2026-33551
Description	An issue was discovered in OpenStack Keystone 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0. Restricted application credentials can create EC2 credentials. By using a restricted application credential to call the EC2 credential creation API, an authenticated user with only a reader role may obtain an EC2/S3 credential that carries the full set of the parent user's S3 permissions, effectively bypassing the role restrictions imposed on the application credential. Only deployments that use restricted application credentials in combination with the EC2/S3 compatibility API (swift3 / s3api) are affected.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4611-1
Debian Bugs	1133118

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
keystone (PTS)	bullseye	2:18.0.0-3+deb11u1	vulnerable
	bullseye (security)	2:18.1.0-1+deb11u3	fixed
	bookworm, bookworm (security)	2:22.0.2-0+deb12u1	vulnerable
	trixie, trixie (security)	2:27.0.0-3+deb13u1	vulnerable
	sid, forky	2:29.0.1-2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
keystone	source	bullseye	2:18.1.0-1+deb11u3		DLA-4611-1
keystone	source	(unstable)	2:29.0.0-2			1133118

Notes

[trixie] - keystone <no-dsa> (Minor issue)
[bookworm] - keystone <no-dsa> (Minor issue)
https://launchpad.net/bugs/2142138
https://www.openwall.com/lists/oss-security/2026/04/07/12

Home - Debian Security - Source (Git)

Apply commands

text fix

Notes

[trixie] - keystone <no-dsa> (Minor issue)[bookworm] - keystone <no-dsa> (Minor issue)https://launchpad.net/bugs/2142138https://www.openwall.com/lists/oss-security/2026/04/07/12

OS impact

Debian Mixed 5 releases

Version	Status	Fixed in
trixie	Affected	—
sid	Fixed	`2:29.0.0-2`
forky	Fixed	`2:29.0.0-2`
bullseye	Fixed	`2:18.1.0-1+deb11u3`
bookworm	Affected	—

Package impact

Ecosystem	Package	Vulnerable	Fixed
PyPI	keystone	`>=14.0.0,<26.1.1`	`26.1.1`

References

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

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