CVE-2023-22465 json
Http4s has fatal error parsing User-Agent and Server headers
published 2023-01-04 3 y ago modified 2026-06-17 4 mo ago also GHSA-54w6-vxfh-fw7f , EUVD-2023-0335
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 59%
- public exploits
- 0
- none known
Summary
Http4s is a Scala interface for HTTP services. Starting with version 0.1.0 and prior to versions 0.21.34, 0.22.15, 0.23.17, and 1.0.0-M38, the `User-Agent` and `Server` header parsers are susceptible to a fatal error on certain inputs. In http4s, modeled headers are lazily parsed, so this only applies to services that explicitly request these typed headers. Fixes are released in 0.21.34, 0.22.15, 0.23.17, and 1.0.0-M38. As a workaround, use the weakly typed header interface.
Patch / fix
- maven org.http4s:http4s-core_2.13 0.21.34, 0.22.15, 0.23.17, 1.0.0-M38
- maven org.http4s:http4s-core_2.12 0.21.34, 0.22.15, 0.23.17
- typelevel http4s 0.21.34, 0.22.15, 0.23.17
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 19 mo ago
Exploit prediction
0.89% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/http4s/http4s/security/advisories/GHSA-54w6-vxfh-fw7f referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.http4s:http4s-core_2.13 | >=0.1.0, <0.21.34 >=0.22.0, <0.22.15 >=0.23.0, <0.23.17 >=1.0.0-M1, <1.0.0-M38 |
0.21.34 0.22.15 0.23.17 1.0.0-M38 |
| maven | org.http4s:http4s-core_2.10 | >=0.1.0, <=0.9.3 |
no fix listed |
| maven | org.http4s:http4s-core_2.11 | >=0.1.0, <=0.21.0-M1 |
no fix listed |
| maven | org.http4s:http4s-core_2.12 | >=0.1.0, <0.21.34 >=0.22.0, <0.22.15 >=0.23.0, <0.23.17 |
0.21.34 0.22.15 0.23.17 |
| maven | org.http4s:http4s-core | >=1.0.0-M1, <=1.0.0-M30 |
no fix listed |
Affected products
- http4s http4s
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
github.com
/http4s/http4s/security/advisories/GHSA-54w6-vxfh-fw7f
web, exploit, mitigation, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2023-22465
advisory
-
github.com
/http4s/http4s
package
Sources
- CVE List CVE-2023-22465
- GitHub Advisory GHSA-54w6-vxfh-fw7f
- NVD CVE-2023-22465
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