CVE Explorer
CVE-2026-40562
Gazelle versions through 0.49 for Perl allows HTTP Request Smuggling via Improper Header Precedence.
Gazelle incorrectly prioritizes "Content-Length" over "Transfer-Encoding: chunked" when both headers are present in an HTTP request. Per RFC 7230 3.3.3, Transfer-Encoding must take precedence.
An attacker could exploit this to smuggle malicious HTTP requests via a front-end reverse proxy.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"collectionURL":"https://cpan.org/modules","defaultStatus":"unaffected","packageName":"Gazelle","product":"Gazelle","programFiles":["lib/Plack/Handler/Gazelle.pm","lib/Plack/Handler/Gazelle.xs"],"programRoutines":[{"name":"Plack::Handler::Gazelle::run"},{"name":"lib/Plack/Handler/Gazelle.xs::_parse_http_request"}],"repo":"https://github.com/kazeburo/Gazelle","vendor":"KAZEBURO","versions":[{"lessThanOrEqual":"0.49","status":"affected","version":"0","versionType":"custom"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:18059a33de0f291d26d610bdd858977773ff9ca7c80503d13cb14e86bbcb4523 · sha256:f56d7798a641ea90… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:18059a33de0f291d26d610bdd858977773ff9ca7c80503d13cb14e86bbcb4523 · sha256:f56d7798a641ea90… · /containers/adp/0/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-444","description":"CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:18059a33de0f291d26d610bdd858977773ff9ca7c80503d13cb14e86bbcb4523 · sha256:f56d7798a641ea90… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"url":"http://www.openwall.com/lists/oss-security/2026/05/06/7"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:18059a33de0f291d26d610bdd858977773ff9ca7c80503d13cb14e86bbcb4523 · sha256:f56d7798a641ea90… · /containers/adp/1/references/0
{"url":"https://datatracker.ietf.org/doc/html/rfc7230#section-3.3.3"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:18059a33de0f291d26d610bdd858977773ff9ca7c80503d13cb14e86bbcb4523 · sha256:f56d7798a641ea90… · /containers/cna/references/0
{"tags":["release-notes"],"url":"https://metacpan.org/release/KAZEBURO/Gazelle-0.50/changes"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:18059a33de0f291d26d610bdd858977773ff9ca7c80503d13cb14e86bbcb4523 · sha256:f56d7798a641ea90… · /containers/cna/references/2
{"tags":["patch"],"url":"https://security.metacpan.org/patches/G/Gazelle/0.49/CVE-2026-40562-r1.patch"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:18059a33de0f291d26d610bdd858977773ff9ca7c80503d13cb14e86bbcb4523 · sha256:f56d7798a641ea90… · /containers/cna/references/1
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.