CVE-2026-41207 json
netty-incubator-codec-ohttp's HPKEContext operations may produce empty byte[] on failures
published 2026-05-26 5 mo ago modified 2026-07-22 3 mo ago also GHSA-f659-372h-6x3x , EUVD-2026-34307
- cvss
- 5.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 8%
- public exploits
- 0
- none known
Summary
The netty incubator codec.bhttp is a java language binary http parser. Prior to version 0.0.21.Final, HKDF_expand returns non-NULL on failure. The byte[] is filled with zeros and has no way to distinguish success from failure. Since this output is used as HKDF key material for the response AEAD, a failure silently produces an all-zero key. When EVP_HPKE_CTX_export fails it also returns an empty byte[] array filled with zeros. This byte[] feeds directly into OHttpCrypto.createResponseAEAD(...). A silent all-zero export secret would produce a deterministic, attacker-predictable AEAD key. Version 0.0.21.Final patches the issue.
Patch / fix
- maven io.netty.incubator:netty-incubator-codec-ohttp 0.0.21.Final
- netty netty-incubator-codec-ohttp 0.0.21
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 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 |
| CNA | 4.0 | 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 |
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | io.netty.incubator:netty-incubator-codec-ohttp | <0.0.21.Final |
0.0.21.Final |
Affected products
- netty netty-incubator-codec-ohttp
Classification
- Weakness
-
- CWE-330 Use of Insufficiently Random Values
References
-
github.com
/netty/netty-incubator-codec-ohttp/commit/3d3b4e527fc82ad0fe3db1af951ffd0ec9a10680
web, patch
-
github.com
/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-f659-372h-6x3x
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-41207
advisory
-
github.com
/netty/netty-incubator-codec-ohttp
package
Sources
- CVE List CVE-2026-41207
- GitHub Advisory GHSA-f659-372h-6x3x
- NVD CVE-2026-41207
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