CVE-2018-14642
An information leak vulnerability was found in Undertow. If all headers are not written out in the first write() call then the code that…
- 5.3MediumCVSS base score
- 2.1%Exploitation in 30 daysEPSS · top 18% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
An information leak vulnerability was found in Undertow. If all headers are not written out in the first write() call then the code that handles flushing the buffer will always write out the full contents of the writevBuffer buffer, which may contain data from previous requests.
Timeline
ID reserved
By redhat
- 53 days later
· 53 days later
Published
- 6 years later
· 6 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 |
|---|---|---|---|
| redhatCNA (assigner) | 3.0 | Medium5.3 | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 2.1% · top 18% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenio.undertow:undertow-coreGHSA-vf6r-mmhc-3xcm (opens in a new tab)
References
References9
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-14642 (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2019:0364 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:0362 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:0365 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:0380 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:1107 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:1108 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:1106 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2019:1140 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_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-2022-5347 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-vf6r-mmhc-3xcm (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-2018-14642)Record last updated .