CVE search · CVE-2026-89044
CVE-2026-89044
medium 6.9
Netty versions 4.1.133.Final through 4.1.137.Final and 4.2.13.Final through 4.2.17.Final fail to properly validate the final transfer coding in the Transfer-Encoding header, allowing attackers to smuggle requests by using malformed encoding declarations. Attackers can split Transfer-Encoding headers across multiple lines or use values like 'chunked, xchunked' to bypass validation and decode messages as chunked when the final coding is not chunked, enabling request smuggling attacks.
Details
- Status
- Analyzed
- Published
- Last changed
- Source
- disclosure@vulncheck.com
- Weakness
- CWE-444
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 4.0 | medium 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
disclosure@vulncheck.comSecondary |
| CVSS 3.1 | medium 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
disclosure@vulncheck.comSecondary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
- netty · netty
References
- https://github.com/netty/nettyProduct
- https://github.com/netty/netty/blob/netty-4.1.137.Final/codec-http/src/main/java/io/netty/handler/codec/http/HttpObjectDecoder.java#L866Product
- https://github.com/netty/netty/commit/640d4d3324f7b811a4903d0730c8ccb35500500cPatch
- https://github.com/netty/netty/commit/ca87393b0e9e13c493d213a268e727a6d44e1585Patch
- https://github.com/netty/netty/releases/tag/netty-4.1.138.FinalRelease Notes
- https://github.com/netty/netty/releases/tag/netty-4.2.18.FinalRelease Notes
- https://github.com/netty/netty/security/advisories/GHSA-hcvj-94mj-jp5cExploitVendor Advisory
- https://www.vulncheck.com/advisories/netty-4.1.133-final-through-4.1.137-final-and-4.2.13-final-through-4.2.17-final-http-request-smuggling-via-transfer-encodingPatchThird Party Advisory