Medium severity · published Aug 22, 2024
CVE-2024-43787
Hono CSRF middleware can be bypassed using crafted Content-Type header
5.0
CVSS
0.2%
EPSS
No
On KEV
Description
Hono is a Web application framework that provides support for any JavaScript runtime. Hono CSRF middleware can be bypassed using crafted Content-Type header. MIME types are case insensitive, but isRequestedByFormElementRe only matches lower-case. As a result, attacker can bypass csrf middleware using upper-case form-like MIME type. This vulnerability is fixed in 4.5.8.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HO
hono · honojs
< 4.5.8 · source: vendor, NVD, CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-43787
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-43787
Product
https://github.com/honojs/hono/blob/b0af71fbcc6dbe44140ea76f16d68dfdb32a99a0/src/middleware/csrf/index.ts#L16-L17
Patch
https://github.com/honojs/hono/commit/41ce840379516410dee60c783142e05bb5a22449
Exploit
https://github.com/honojs/hono/security/advisories/GHSA-rpfr-3m35-5vx5
More from hono
9.8
CVE-2026-29045
Hono: Arbitrary file access via serveStatic vulnerability
8.1
CVE-2025-62610
Hono Improperly Authorizes JWT Audience Validation
7.5
CVE-2026-39408
Hono has a path traversal in toSSG() allows writing files outside the output directory
7.5
CVE-2026-27700
Hono is Vulnerable to Authentication Bypass by IP Spoofing in AWS Lambda ALB conninfo
7.5
CVE-2025-58362
Hono contains a flaw in URL path parsing, potentially leading to path confusion