CVE-2026-26962
rmt-server: rack: improper unfolding of folded multipart headers can lead to header injection or response
CVE-2026-26962 is fixed in 2 products on 1 platform, first by ruby-rack 3.2.4-1ubuntu1.1, released April 2, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
6.5
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0024
14th percentile
rack: improper unfolding of folded multipart headers can lead to header injection or response
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| rmt-server · opensuse-leap 16.0 | 3.1.0-160000.1.1 | OPENSUSE-SU-2026:21640-1 | Aug 25, 2026 |
| rmt-server · sles 15.6 | 2.27-150500.3.47.1 | SUSE-SU-2026:2487-1 | Jun 22, 2026 |
| rmt-server · sles 16.0 | 3.1.0-160000.1.1 | SUSE-SU-2026:23321-1 | Aug 25, 2026 |
| ruby-rack · Debian 13.5 (trixie) | 3.1.20-0+deb13u2 | DEBIAN-CVE-2026-26962 | Apr 2, 2026 |
| ruby-rack · Debian 14 | 3.2.6-2 | DEBIAN-CVE-2026-26962 | Apr 2, 2026 |
| ruby-rack · Ubuntu 24.04.5 LTS (noble) | 2.2.7-1ubuntu0.7 | ruby-rack 2.2.7-1ubuntu0.7 | Apr 30, 2026 |
| ruby-rack · Ubuntu 25.10 (questing) | 3.1.16-0.1ubuntu0.3 | ruby-rack 3.1.16-0.1ubuntu0.3 | Apr 30, 2026 |
| ruby-rack · Ubuntu 26.04.1 LTS (resolute) | 3.2.4-1ubuntu1.1 | ruby-rack 3.2.4-1ubuntu1.1 | Apr 2, 2026 |
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