CVE-2026-41207 json
netty-incubator-codec-ohttp's HPKEContext operations may produce empty byte[] on failures
published 5mo ago modified 3mo ago also EUVD-2026-34307 , GHSA-f659-372h-6x3x
- 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
- io.netty.incubator netty-incubator-codec-ohttp 0.0.21.Final
- netty netty-incubator-codec-ohttp 0.0.21.Final
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5mo ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-09).
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
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.