CVE catalog
CVE-2026-42505
Handshakes which used Encrypted Client Hello could be de-anonymized by a passive network observer due to a disclosure of pre-shared key identities in the unencrypted client hello.
- Severity
- Medium · CVSS 5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.38% · Oct 25, 2026
Handshakes which used Encrypted Client Hello could be de-anonymized by a passive network observer due to a disclosure of pre-shared key identities in the unencrypted client hello.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | golang-1.19 | bookworm | 1.19.8-2 | not affected |
| Go | stdlib | Not reported | 1.27.0-rc.2 | fixed |
| Cpe | go | Not reported | Not reported | unknown |
| Opensuse | go-passbolt-cli | tumbleweed | 0.5.2-1.1 | fixed |
| Opensuse | tekton-cli | tumbleweed | 0.46.0-1.1 | fixed |
| Opensuse | mihomo | tumbleweed | 1.19.28-1.1 | fixed |
| Ubuntu | golang-1.10 | 14.04 | 1.10.4-2ubuntu1~14.04.1 | vulnerable |
| Ubuntu | golang-1.10 | 16.04 | 1.10.4-2ubuntu1~16.04.1 | vulnerable |
| Ubuntu | golang-1.10 | 16.04 | 1.10.4-2ubuntu1~16.04.2 | vulnerable |
| Ubuntu | golang-1.6 | 16.04 | 1.6-0ubuntu1 | vulnerable |
| Ubuntu | golang-1.6 | 16.04 | 1.6-0ubuntu2 | vulnerable |
| Ubuntu | golang-1.6 | 16.04 | 1.6-0ubuntu3 | vulnerable |
| Ubuntu | golang-1.6 | 16.04 | 1.6-0ubuntu4 | vulnerable |
| Ubuntu | golang-1.6 | 16.04 | 1.6-0ubuntu5 | vulnerable |
| Ubuntu | golang-1.6 | 16.04 | 1.6.1-0ubuntu1 | vulnerable |
| Ubuntu | golang-1.6 | 16.04 | 1.6.2-0ubuntu5~16.04 | vulnerable |
| Ubuntu | golang-1.6 | 16.04 | 1.6.2-0ubuntu5~16.04.2 | vulnerable |
| Ubuntu | golang-1.6 | 16.04 | 1.6.2-0ubuntu5~16.04.3 | vulnerable |
| Ubuntu | golang-1.6 | 16.04 | 1.6.2-0ubuntu5~16.04.4 | vulnerable |
| Ubuntu | golang-1.13 | pro | 1.13.8-1ubuntu2 | vulnerable |
| Ubuntu | golang-1.13 | pro | 1.13.8-1ubuntu2.22.04.1 | vulnerable |
| Ubuntu | golang-1.13 | pro | 1.13.8-1ubuntu2.22.04.1+esm1 | vulnerable |
| Ubuntu | golang-1.13 | pro | 1.13.8-1ubuntu2.22.04.2 | vulnerable |
| Ubuntu | golang-1.18 | pro | 1.18.1-1ubuntu1~18.04.3 | vulnerable |
| Ubuntu | golang-1.18 | pro | 1.18.1-1ubuntu1~18.04.4 | vulnerable |
| Ubuntu | golang-1.18 | pro | 1.18.1-1ubuntu1~18.04.4+esm1 | vulnerable |
| Ubuntu | golang-1.10 | 18.04 | 1.10~rc1-1 | vulnerable |
| Ubuntu | golang-1.10 | 18.04 | 1.10~rc1-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.10 | 18.04 | 1.10~rc1-2ubuntu1 | vulnerable |
| Ubuntu | golang-1.10 | 18.04 | 1.10~rc2-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.10 | 18.04 | 1.10-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.10 | 18.04 | 1.10.1-1ubuntu2 | vulnerable |
| Ubuntu | golang-1.10 | 18.04 | 1.10.4-2ubuntu1~18.04.1 | vulnerable |
| Ubuntu | golang-1.10 | 18.04 | 1.10.4-2ubuntu1~18.04.2 | vulnerable |
| Ubuntu | golang-1.16 | pro | 1.16.2-0ubuntu1~20.04 | vulnerable |
| Ubuntu | golang-1.16 | pro | 1.16.2-0ubuntu1~20.04.1 | vulnerable |
| Ubuntu | golang-1.16 | pro | 1.16.2-0ubuntu1~20.04.1+esm1 | vulnerable |
| Ubuntu | golang-1.8 | 18.04 | 1.8.3-2ubuntu1 | vulnerable |
| Ubuntu | golang-1.8 | 18.04 | 1.8.3-2ubuntu1.18.04.1 | vulnerable |
| Ubuntu | golang-1.9 | 18.04 | 1.9.1-2ubuntu1 | vulnerable |
| Ubuntu | golang-1.9 | 18.04 | 1.9.2-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.9 | 18.04 | 1.9.2-3ubuntu1 | vulnerable |
| Ubuntu | golang-1.9 | 18.04 | 1.9.3-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.9 | 18.04 | 1.9.4-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.13 | 20.04 | 1.13.1-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.13 | 20.04 | 1.13.3-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.13 | 20.04 | 1.13.4-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.13 | 20.04 | 1.13.5-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.13 | 20.04 | 1.13.6-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.13 | 20.04 | 1.13.6-2ubuntu1 | vulnerable |
| Ubuntu | golang-1.13 | 20.04 | 1.13.7-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.13 | 20.04 | 1.13.8-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.13 | 20.04 | 1.13.8-1ubuntu1.1 | vulnerable |
| Ubuntu | golang-1.13 | 20.04 | 1.13.8-1ubuntu1.2 | vulnerable |
| Ubuntu | golang-1.14 | 20.04 | 1.14~beta1-1 | vulnerable |
| Ubuntu | golang-1.14 | 20.04 | 1.14~beta1-2 | vulnerable |
| Ubuntu | golang-1.14 | 20.04 | 1.14~rc1-1 | vulnerable |
| Ubuntu | golang-1.14 | 20.04 | 1.14-1 | vulnerable |
| Ubuntu | golang-1.14 | 20.04 | 1.14.1-1 | vulnerable |
| Ubuntu | golang-1.14 | 20.04 | 1.14.2-1 | vulnerable |
| Ubuntu | golang-1.14 | 20.04 | 1.14.2-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.14 | 20.04 | 1.14.3-2ubuntu2~20.04.1 | vulnerable |
| Ubuntu | golang-1.14 | 20.04 | 1.14.3-2ubuntu2~20.04.2 | vulnerable |
| Ubuntu | golang-1.18 | 20.04 | 1.18.1-1ubuntu1~20.04.1 | vulnerable |
| Ubuntu | golang-1.18 | 20.04 | 1.18.1-1ubuntu1~20.04.2 | vulnerable |
| Ubuntu | golang-1.18 | 20.04 | 1.18.1-1ubuntu1~20.04.3 | vulnerable |
| Ubuntu | golang-1.20 | 20.04 | 1.20.3-1ubuntu0.1~20.04 | vulnerable |
| Ubuntu | golang-1.20 | 20.04 | 1.20.3-1ubuntu0.1~20.04.1 | vulnerable |
| Ubuntu | golang-1.21 | 20.04 | 1.21.1-1~ubuntu20.04.1 | vulnerable |
| Ubuntu | golang-1.21 | 20.04 | 1.21.1-1~ubuntu20.04.2 | vulnerable |
| Ubuntu | golang-1.21 | 20.04 | 1.21.1-1~ubuntu20.04.3 | vulnerable |
| Ubuntu | golang-1.22 | 20.04 | 1.22.2-2~20.04.1 | vulnerable |
| Ubuntu | golang-1.22 | 20.04 | 1.22.2-2~20.04.2 | vulnerable |
| Ubuntu | golang-1.22 | 20.04 | 1.22.2-2~20.04.3 | vulnerable |
| Ubuntu | golang-1.17 | 22.04 | 1.17-1ubuntu2 | vulnerable |
| Ubuntu | golang-1.17 | 22.04 | 1.17.3-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.17 | 22.04 | 1.17.3-1ubuntu2 | vulnerable |
| Ubuntu | golang-1.17 | 22.04 | 1.17.13-3ubuntu1 | vulnerable |
| Ubuntu | golang-1.17 | 22.04 | 1.17.13-3ubuntu1.2 | vulnerable |
| Ubuntu | golang-1.17 | 22.04 | 1.17.13-3ubuntu1.3 | vulnerable |
| Ubuntu | golang-1.18 | 22.04 | 1.18~beta1-0ubuntu1 | vulnerable |
| Ubuntu | golang-1.18 | 22.04 | 1.18~beta2-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.18 | 22.04 | 1.18~beta2-1ubuntu2 | vulnerable |
| Ubuntu | golang-1.18 | 22.04 | 1.18~rc1-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.18 | 22.04 | 1.18-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.18 | 22.04 | 1.18.1-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.18 | 22.04 | 1.18.1-1ubuntu1.1 | vulnerable |
| Ubuntu | golang-1.18 | 22.04 | 1.18.1-1ubuntu1.2 | vulnerable |
| Ubuntu | golang-1.18 | 22.04 | 1.18.1-1ubuntu1.3 | vulnerable |
| Ubuntu | golang-1.20 | 22.04 | 1.20.3-1ubuntu0.1~22.04 | vulnerable |
| Ubuntu | golang-1.20 | 22.04 | 1.20.3-1ubuntu0.1~22.04.1 | vulnerable |
| Ubuntu | golang-1.21 | 22.04 | 1.21.1-1~ubuntu22.04.1 | vulnerable |
| Ubuntu | golang-1.21 | 22.04 | 1.21.1-1~ubuntu22.04.2 | vulnerable |
| Ubuntu | golang-1.21 | 22.04 | 1.21.1-1~ubuntu22.04.3 | vulnerable |
| Ubuntu | golang-1.21 | 22.04 | 1.21.1-1~ubuntu22.04.4 | vulnerable |
| Ubuntu | golang-1.22 | 22.04 | 1.22.2-2~22.04 | vulnerable |
| Ubuntu | golang-1.22 | 22.04 | 1.22.2-2~22.04.1 | vulnerable |
| Ubuntu | golang-1.22 | 22.04 | 1.22.2-2~22.04.2 | vulnerable |
| Ubuntu | golang-1.22 | 22.04 | 1.22.2-2~22.04.3 | vulnerable |
| Ubuntu | golang-1.22 | 22.04 | 1.22.2-2~22.04.4 | vulnerable |
| Ubuntu | golang-1.23 | 22.04 | 1.23.1-1~22.04 | vulnerable |
| Ubuntu | golang-1.23 | 22.04 | 1.23.1-1~22.04.2 | vulnerable |
| Ubuntu | golang-1.23 | 22.04 | 1.23.1-1~22.04.3 | vulnerable |
| Ubuntu | golang-1.24 | 22.04 | 1.24.4-1ubuntu1~22.04.1 | vulnerable |
| Ubuntu | golang-1.24 | 22.04 | 1.24.4-1ubuntu1~22.04.2 | vulnerable |
| Ubuntu | golang-1.24 | 22.04 | 1.24.13-2~22.04.1 | vulnerable |
| Ubuntu | golang-1.24 | 22.04 | 1.24.13-2~22.04.2 | vulnerable |
| Ubuntu | golang-1.25 | 22.04 | 1.25.14-1~ubuntu0.22.04.1 | vulnerable |
| Ubuntu | golang-1.21 | 24.04 | 1.21.1-1 | vulnerable |
| Ubuntu | golang-1.21 | 24.04 | 1.21.3-1 | vulnerable |
| Ubuntu | golang-1.21 | 24.04 | 1.21.4-1 | vulnerable |
| Ubuntu | golang-1.21 | 24.04 | 1.21.5-1 | vulnerable |
| Ubuntu | golang-1.21 | 24.04 | 1.21.6-1 | vulnerable |
| Ubuntu | golang-1.21 | 24.04 | 1.21.7-1 | vulnerable |
| Ubuntu | golang-1.21 | 24.04 | 1.21.7-2 | vulnerable |
| Ubuntu | golang-1.21 | 24.04 | 1.21.8-1 | vulnerable |
| Ubuntu | golang-1.21 | 24.04 | 1.21.8-1build1 | vulnerable |
| Ubuntu | golang-1.21 | 24.04 | 1.21.9-1 | vulnerable |
| Ubuntu | golang-1.21 | 24.04 | 1.21.9-1ubuntu0.1 | vulnerable |
| Ubuntu | golang-1.22 | 24.04 | 1.22~rc1-2 | vulnerable |
| Ubuntu | golang-1.22 | 24.04 | 1.22.0-1 | vulnerable |
| Ubuntu | golang-1.22 | 24.04 | 1.22.0-2 | vulnerable |
| Ubuntu | golang-1.22 | 24.04 | 1.22.1-1 | vulnerable |
| Ubuntu | golang-1.22 | 24.04 | 1.22.1-1build1 | vulnerable |
| Ubuntu | golang-1.22 | 24.04 | 1.22.2-2 | vulnerable |
| Ubuntu | golang-1.22 | 24.04 | 1.22.2-2ubuntu0.1 | vulnerable |
| Ubuntu | golang-1.22 | 24.04 | 1.22.2-2ubuntu0.2 | vulnerable |
| Ubuntu | golang-1.22 | 24.04 | 1.22.2-2ubuntu0.3 | vulnerable |
| Ubuntu | golang-1.22 | 24.04 | 1.22.2-2ubuntu0.4 | vulnerable |
| Ubuntu | golang-1.22 | 24.04 | 1.22.2-2ubuntu0.5 | vulnerable |
| Ubuntu | golang-1.23 | 24.04 | 1.23.1-1~24.04 | vulnerable |
| Ubuntu | golang-1.23 | 24.04 | 1.23.1-1~24.04.1 | vulnerable |
| Ubuntu | golang-1.24 | 24.04 | 1.24.4-1ubuntu1~24.04.1 | vulnerable |
| Ubuntu | golang-1.24 | 24.04 | 1.24.4-1ubuntu1~24.04.2 | vulnerable |
| Ubuntu | golang-1.24 | 24.04 | 1.24.13-2~24.04.1 | vulnerable |
| Ubuntu | golang-1.25 | 24.04 | 1.25.14-1~ubuntu0.24.04.1 | vulnerable |
| Ubuntu | golang-1.23 | 25.10 | 1.23.8-1 | vulnerable |
| Ubuntu | golang-1.23 | 25.10 | 1.23.10-1 | vulnerable |
| Ubuntu | golang-1.23 | 25.10 | 1.23.10-1ubuntu0.2 | vulnerable |
| Ubuntu | golang-1.24 | 25.10 | 1.24.2-1 | vulnerable |
| Ubuntu | golang-1.24 | 25.10 | 1.24.2-2 | vulnerable |
| Ubuntu | golang-1.24 | 25.10 | 1.24.4-1 | vulnerable |
| Ubuntu | golang-1.24 | 25.10 | 1.24.4-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.25 | 25.10 | 1.25.0-0ubuntu1 | vulnerable |
| Ubuntu | golang-1.25 | 25.10 | 1.25.7-2~25.10.1 | vulnerable |
| Ubuntu | golang-1.23 | 26.04 | 1.23.10-1 | vulnerable |
| Ubuntu | golang-1.24 | 26.04 | 1.24.4-1ubuntu1 | vulnerable |
| Ubuntu | golang-1.24 | 26.04 | 1.24.9-1 | vulnerable |
| Ubuntu | golang-1.24 | 26.04 | 1.24.13-2 | vulnerable |
| Ubuntu | golang-1.25 | 26.04 | 1.25.0-0ubuntu1 | vulnerable |
| Ubuntu | golang-1.25 | 26.04 | 1.25.7-2 | vulnerable |
| Ubuntu | golang-1.25 | 26.04 | 1.25.14-1~ubuntu0.26.04.1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | golang-1.19 | source | bookworm | Not affected | unimportant | Not reported | Not reported |
| Go | stdlib | Go | Not reported | 1.27.0-rc.2 | Not reported | Not reported | Not reported |
| Opensuse | go-passbolt-cli | rpm | tumbleweed | 0.5.2-1.1 | Not reported | OPENSUSE-SU-2026:11798-1 | Not reported |
| Opensuse | tekton-cli | rpm | tumbleweed | 0.46.0-1.1 | Not reported | OPENSUSE-SU-2026:11471-1 | Not reported |
| Opensuse | mihomo | rpm | tumbleweed | 1.19.28-1.1 | Not reported | OPENSUSE-SU-2026:11216-1 | Not reported |
OpenFactory catalog packages
[Debian 13 (Trixie)]
- [golang-1.24]Affected
Details (2)
1.24.4-1· all · trixieAffected
nvd · golang-1.24 · debian · 13
1.24.4-1· all · trixieAffected
nvd · golang-1.24 · debian · 13
- [golang-1.24-doc]Affected
Source package: [golang-1.24]
Details (2)
1.24.4-1· all · trixieAffected
nvd · golang-1.24 · debian · 13
1.24.4-1· all · trixieAffected
nvd · golang-1.24 · debian · 13
- [golang-1.24-go]Affected
Source package: [golang-1.24]
Details (2)
1.24.4-1· amd64 · trixieAffected
nvd · golang-1.24 · debian · 13
1.24.4-1· arm64 · trixieAffected
nvd · golang-1.24 · debian · 13
- [golang-1.24-src]Affected
Source package: [golang-1.24]
Details (2)
1.24.4-1· all · trixieAffected
nvd · golang-1.24 · debian · 13
1.24.4-1· all · trixieAffected
nvd · golang-1.24 · debian · 13
[openSUSE Tumbleweed]
- [go-passbolt-cli]Affected
Source package: [go-passbolt-cli]
Details (1)
0.5.1-1.2· x86_64 · tumbleweedAffected · Fixed:
0.5.2-1.1nvd · go-passbolt-cli · opensuse · tumbleweed
- [go-passbolt-cli-bash-completion]Unknown
Source package: [go-passbolt-cli]
Details (1)
0.5.1-1.2· noarch · tumbleweedUnknown · Fixed:
0.5.2-1.1Version impact unknown
nvd · go-passbolt-cli · opensuse · tumbleweed
- [go-passbolt-cli-fish-completion]Unknown
Source package: [go-passbolt-cli]
Details (1)
0.5.1-1.2· noarch · tumbleweedUnknown · Fixed:
0.5.2-1.1Version impact unknown
nvd · go-passbolt-cli · opensuse · tumbleweed
- [go-passbolt-cli-zsh-completion]Unknown
Source package: [go-passbolt-cli]
Details (1)
0.5.1-1.2· noarch · tumbleweedUnknown · Fixed:
0.5.2-1.1Version impact unknown
nvd · go-passbolt-cli · opensuse · tumbleweed
- [tekton-cli-bash-completion]Unknown
Source package: [tekton-cli]
Details (1)
0.46.0-1.1· noarch · tumbleweedUnknown · Fixed:
0.46.0-1.1Version impact unknown
nvd · tekton-cli · opensuse · tumbleweed
- [tekton-cli-fish-completion]Unknown
Source package: [tekton-cli]
Details (1)
0.46.0-1.1· noarch · tumbleweedUnknown · Fixed:
0.46.0-1.1Version impact unknown
nvd · tekton-cli · opensuse · tumbleweed
- [tekton-cli-zsh-completion]Unknown
Source package: [tekton-cli]
Details (1)
0.46.0-1.1· noarch · tumbleweedUnknown · Fixed:
0.46.0-1.1Version impact unknown
nvd · tekton-cli · opensuse · tumbleweed
- [mihomo]Fixed
Source package: [mihomo]
Details (1)
1.19.30-1.1· x86_64 · tumbleweedFixed · Fixed:
1.19.28-1.1nvd · mihomo · opensuse · tumbleweed
- [tekton-cli]Fixed
Source package: [tekton-cli]
Details (1)
0.46.0-1.1· x86_64 · tumbleweedFixed · Fixed:
0.46.0-1.1nvd · tekton-cli · opensuse · tumbleweed
[Debian 12 (Bookworm)]
- [golang-1.19]Not affected
Details (2)
1.19.8-2· all · bookwormNot affected
nvd · golang-1.19 · debian · bookworm
1.19.8-2· all · bookwormNot affected
nvd · golang-1.19 · debian · bookworm
- [golang-1.19-doc]Not affected
Source package: [golang-1.19]
Details (2)
1.19.8-2· all · bookwormNot affected
nvd · golang-1.19 · debian · bookworm
1.19.8-2· all · bookwormNot affected
nvd · golang-1.19 · debian · bookworm
- [golang-1.19-go]Not affected
Source package: [golang-1.19]
Details (2)
1.19.8-2· amd64 · bookwormNot affected
nvd · golang-1.19 · debian · bookworm
1.19.8-2· arm64 · bookwormNot affected
nvd · golang-1.19 · debian · bookworm
- [golang-1.19-src]Not affected
Source package: [golang-1.19]
Details (2)
1.19.8-2· all · bookwormNot affected
nvd · golang-1.19 · debian · bookworm
1.19.8-2· all · bookwormNot affected
nvd · golang-1.19 · debian · bookworm
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11212-1.json]
- [https://go.dev/cl/775960]
- [https://go.dev/issue/79282]
- [https://groups.google.com/g/golang-announce/c/OrmQE_Yp5Sc]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-42505]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-42505]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-42505]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11216-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11471-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11798-1]
- [https://pkg.go.dev/vuln/GO-2026-5856]
- [https://security-tracker.debian.org/tracker/CVE-2026-42505]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42505.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2239.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [Go Vulnerability Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]