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CVE-2021-3531A flaw was found in the Red Hat Ceph Storage RGW in versions before 14.2.21. When processing a GET Request for a swift URL that ends with…
- 5.3MediumCVSS base score
- 2.2%Exploitation in 30 daysEPSS · top 17% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A flaw was found in the Red Hat Ceph Storage RGW in versions before 14.2.21. When processing a GET Request for a swift URL that ends with two slashes it can cause the rgw to crash, resulting in a denial of service. The greatest threat to the system is of availability.
Timeline
ID reserved
By redhat
- 15 days later
· 15 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
- EPSS (exploitation in 30 days)
- 2.2% · top 17% of all CVEs (13 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
ceph
- affected ceph 14.2.21
References
References7
- [oss-security] 20210514 CVE-2021-3531: Ceph: RGW unauthenticated denial of service (opens in a new tab)mailing-listx_transferred
- [oss-security] 20210517 Re: CVE-2021-3531: Ceph: RGW unauthenticated denial of service (opens in a new tab)mailing-listx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=1955326 (opens in a new tab)x_transferred
- FEDORA-2021-ec414c5e18 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2021-6e540b85b9 (opens in a new tab)vendor-advisoryx_transferred
- FEDORA-2021-1bf13db941 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20231023 [SECURITY] [DLA 3629-1] ceph security update (opens in a new tab)mailing-listx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-26847 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-3531)Record last updated .