CVE-2021-41973
Apache MINA HTTP listener DOS
- Published
- Updated
- Reserved
- Assigned by
- apache
Description
In Apache MINA, a specifically crafted, malformed HTTP request may cause the HTTP Header decoder to loop indefinitely. The decoder assumed that the HTTP Header begins at the beginning of the buffer and loops if there is more data than expected. Please update MINA to 2.1.5 or greater.
Timeline
ID reserved
By apache
- 28 days later
· 28 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 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 4.6% · top 8.2% of all CVEs (7 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
Apache Software Foundation · Apache MINA
- affected Apache MINA – < 2.1.5
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenorg.apache.mina:mina-coreGHSA-6mcm-j9cj-3vc3 (opens in a new tab)
References (4)
- https://lists.apache.org/thread.html/r0b907da9340d5ff4e6c1a4798ef4e79700a668657f27cca8a39e9250%40%3Cdev.mina.apache.org%3E (opens in a new tab)x_refsource_MISCx_transferred
- [oss-security] 20211101 [ANNOUNCE] Apache MINA 2.0.22 & 2.1.5 released (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [oss-security] 20211101 CVE-2021-41973: Apache MINA HTTP listener DOS (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://www.oracle.com/security-alerts/cpuapr2022.html (opens in a new tab)x_refsource_MISCx_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)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-6mcm-j9cj-3vc3 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-41973)Record last updated .