CVE-2021-37148 json
Request Smuggling - transfer encoding validation
published 5y ago modified 4mo ago also EUVD-2021-23722
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.7%
- EPSS 2.7% chance of exploitation in 30 days, percentile 86%
- public exploits
- 0
- none known
Summary
Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.0.1.
Patch / fix
- trafficserver Debian 12 9.1.1+ds-1
debian advisories DEBIAN-CVE-2021-37148
Is CVE-2021-37148 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
2.70% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
Affected products
- Apache Software Foundation Apache Traffic Server
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
lists.apache.org
/thread/k01797hyncx53659wr3o72s5cvkc3164
mailing-list, patch, vendor-advisory
-
debian.org
/security/2022/dsa-5153
vendor-advisory, third-party-advisory
Sources
- CVE List CVE-2021-37148
- NVD CVE-2021-37148
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.