CVE-2026-80255
unknown
CVSS v3
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CVSS v4 NEW
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VIR risk
—
Description
A `Set-Cookie:` header using tab (horizontal tab, ASCII code 9) instead of space (ascii code 32) immediately before the `Secure` attribute causes curl to store the cookie without its Secure flag. The cookie might then wrongfully be sent over plaintext HTTP on subsequent requests to the same host.
Predictions
Exploit likelihood
20%
Patch ETA
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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
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Mixed 4 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Affected | — |
| sid | Fixed | 8.22.0-1 |
| forky | Affected | — |
| bookworm | Fixed | 0 |
Alpine Fixed 2 releases
| Version | Status | Fixed in |
|---|---|---|
| v3.24 | Fixed | 8.22.0-r0 |
| v3.23 | Fixed | 8.22.0-r0 |
References
- https://www.suse.com/security/cve/CVE-2026-80255.html
- https://security-tracker.debian.org/tracker/CVE-2026-80255
- https://security.alpinelinux.org/vuln/CVE-2026-80255
- https://pkgs.alpinelinux.org/packages?name=curl
- https://curl.se/docs/CVE-2026-80255.html
- https://curl.se/docs/CVE-2026-80255.json
- https://hackerone.com/reports/3972395
CWEs
CWE-201
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.