CVE-2025-47908
Description
Middleware causes a prohibitive amount of heap allocations when processing malicious preflight requests that include a Access-Control-Request-Headers (ACRH) header whose value contains many commas. This behavior can be abused by attackers to produce undue load on the middleware/server as an attempt to cause a denial of service.
Predictions
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 | 0 |
| sid | Fixed | 0 |
| forky | Fixed | 0 |
| bullseye | Fixed | 0 |
| bookworm | Fixed | 0 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | github.com/rs/cors | >=1.9.0,<1.11.0 | 1.11.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-47908
- https://github.com/rs/cors/issues/170
- https://github.com/rs/cors/pull/171
- https://github.com/rs/cors/commit/4c32059b2756926619f6bf70281b91be7b5dddb2
- https://github.com/rs/cors
- https://pkg.go.dev/vuln/GO-2024-2883
- https://security-tracker.debian.org/tracker/CVE-2025-47908
- https://www.suse.com/security/cve/CVE-2025-47908.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.