CVE-2026-0865
medium
CVSS v3
—
CVSS v4 NEW
—
VIR risk
5.5
Description
User-controlled header names and values containing newlines can allow injecting HTTP headers.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rocky | 8 | fixed | |
| rhel | 9 | fixed | |
| debian | bookworm | fixed | 3.11.2-6+deb12u7 |
| debian | bullseye | fixed | 3.9.2-1+deb11u5 |
| debian | trixie | fixed | 3.13.5-2+deb13u1 |
| sles | affected | | |
| rocky | 9 | fixed | |
| debian | forky | fixed | 7.3.21+dfsg-1 |
| debian | sid | fixed | 7.3.21+dfsg-1 |
| almalinux | 9 | fixed | python3-tkinter-3.9.25-3.el9_7.1.aarch64.rpm |
References
- https://errata.rockylinux.org/RLSA-2026:4473
- https://errata.rockylinux.org/RLSA-2026:4463
- https://access.redhat.com/errata/RHSA-2026:18693
- https://access.redhat.com/errata/RHSA-2026:18957
- https://access.redhat.com/errata/RHSA-2026:18958
- https://access.redhat.com/errata/RHSA-2026:19176
- https://access.redhat.com/errata/RHSA-2026:4168
- https://security-tracker.debian.org/tracker/CVE-2026-0865
- https://www.suse.com/security/cve/CVE-2026-0865.html
- https://errata.rockylinux.org/RLSA-2026:4168
- https://bugzilla.redhat.com/2431367
- https://bugzilla.redhat.com/2444691
- https://bugzilla.redhat.com/2448168
- https://bugzilla.redhat.com/2448181
- https://bugzilla.redhat.com/2449649
- https://bugzilla.redhat.com/2457409
- https://bugzilla.redhat.com/2457932
- https://bugzilla.redhat.com/2458049
- https://bugzilla.redhat.com/2458239
- https://errata.almalinux.org/9/ALSA-2026-19176.html
- https://access.redhat.com/errata/RHSA-2026:4463
- https://bugzilla.redhat.com/2431368
- https://bugzilla.redhat.com/2431373
- https://bugzilla.redhat.com/2432437
- https://errata.almalinux.org/8/ALSA-2026-4463.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.