The Olivier Poitrey Go CORS handler through 1.3.0 actively converts a wildcard CORS policy into reflecting an arbitrary Origin header value, which is incompatible with the CORS security design, and could lead to CORS misconfiguration security problems
Published Jan 28, 2019
5.9
MEDIUMCVSS 3.0
EPSS 0.72%
Description
The Olivier Poitrey Go CORS handler through 1.3.0 actively converts a wildcard CORS policy into reflecting an arbitrary Origin header value, which is incompatible with the CORS security design, and could lead to CORS misconfiguration security problems.
Affected products
No data.
- ≤ 1.3.0
No data.
No Red Hat product state for this CVE.
github.com/gofiber/fiber/v2
Go
Introduced 2.0.0 Fixed 2.43.0github.com/rs/cors
Go
Introduced 0 Fixed 1.5.0
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/gofiber/fiber/v2 | 2.0.0 | 2.43.0 |
| Go | github.com/rs/cors | 0 | 1.5.0 |
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
AV:N/AC:M/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.72% (0.00717) | 52.16th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.72% (0.00717) | 52.35th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.13% (0.00133) | 48.93th | v3 (v2023.03.01) |
| Jun 20, 2024 | 0.13% (0.00133) | 48.66th | v3 (v2023.03.01) |
| Jan 22, 2024 | 0.12% (0.00117) | 45.52th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.11% (0.00112) | 42.77th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00833) | 24.58th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
References (9)
- http://www.securityfocus.com/bid/106834 vdb-entryx_refsource_BIDThird Party Advisory
- https://github.com/advisories/GHSA-927h-x4qj-r242 Advisory
- https://github.com/gofiber/fiber/issues/2338
- https://github.com/gofiber/fiber/pull/2339
- https://github.com/rs/cors/issues/55 x_refsource_MISCIssue TrackingThird Party Advisory
- https://github.com/rs/cors/pull/57
- https://nvd.nist.gov/vuln/detail/CVE-2018-20744
- https://web.archive.org/web/20200227091122/http://www.securityfocus.com/bid/106834
- https://www.usenix.org/system/files/conference/usenixsecurity18/sec18-chen.pdf x_refsource_MISCThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/106834 | vdb-entryx_refsource_BIDThird Party Advisory | |
| https://github.com/advisories/GHSA-927h-x4qj-r242 | Advisory | |
| https://github.com/gofiber/fiber/issues/2338 | ||
| https://github.com/gofiber/fiber/pull/2339 | ||
| https://github.com/rs/cors/issues/55 | x_refsource_MISCIssue TrackingThird Party Advisory | |
| https://github.com/rs/cors/pull/57 | ||
| https://nvd.nist.gov/vuln/detail/CVE-2018-20744 | ||
| https://web.archive.org/web/20200227091122/http://www.securityfocus.com/bid/106834 | ||
| https://www.usenix.org/system/files/conference/usenixsecurity18/sec18-chen.pdf | x_refsource_MISCThird Party Advisory |
Change history (0)
No recorded changes yet.