CVE-2025-26803
unknown
CVSS v3
—
CVSS v4 NEW
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VIR risk
—
Description
The http parser in Phusion Passenger 6.0.21 through 6.0.25 before 6.0.26 allows a denial of service during parsing of a request with an invalid HTTP method.
Predictions
Exploit likelihood
30%
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
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 6.0.26+ds-1 |
| sid | Fixed | 6.0.26+ds-1 |
| forky | Fixed | 6.0.26+ds-1 |
| bullseye | Fixed | 0 |
| bookworm | Fixed | 0 |
References
- https://github.com/advisories/GHSA-2cj2-qqxj-5m3r
- https://www.suse.com/security/cve/CVE-2025-26803.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-26803
- https://github.com/phusion/passenger/commit/bb15591646687064ab2d578d5f9660b2a4168017
- https://blog.phusion.nl/2025/02/19/passenger-6-0-26
- https://github.com/phusion/passenger
- https://github.com/phusion/passenger/compare/release-6.0.25...release-6.0.26
- https://github.com/phusion/passenger/releases/tag/release-6.0.26
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/passenger/CVE-2025-26803.yml
- https://www.phusionpassenger.com/support
- https://security-tracker.debian.org/tracker/CVE-2025-26803
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.