CVE-2026-4541
janmojzis tinyssh Ed25519 Signature crypto_sign_ed25519_tinyssh.c signature verification
A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack's complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17. Upgrading the affected component is recommended.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
janmojzis tinyssh Ed25519 Signature crypto_sign_ed25519_tinyssh.c signature verification
A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack's complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17. Upgrading the affected component is recommended.
- Record
CVE-2026-4541- CVSS 4.0
- 2.0 Low
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P - CVSS 3.1
- 2.5 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C - CVSS 3.0
- 2.5 Low
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N/E:P/RL:O/RC:C - CVSS 2.0
- 1.0
AV:L/AC:H/Au:S/C:N/I:P/A:N/E:POC/RL:OF/RC:C - Weakness
- CWE-347, CWE-345
- Updated
- 2026-11-02
EUVDEUVD-2026-14291
A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack's complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17. Upgrading the affected component is recommended.
- Record
EUVD-2026-14291- CVSS 4.0
- 2.0 Low
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-g37f-4r6m-qg8m
A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the...
A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack's complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17. Upgrading the affected component is recommended. If you want to get best quality of vulnerability data, you may have to visit VulDB.
- Record
GHSA-g37f-4r6m-qg8m- CVSS 4.0
- 1.1 Low
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/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 - CVSS 3.1
- 2.5 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-345
- Updated
- 2026-11-02
NVD
A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack's complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17. Upgrading the affected component is recommended.
- Record
CVE-2026-4541- CVSS 4.0
- 1.1 Low
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/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 - CVSS 3.1
- 2.5 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - CVSS 2.0
- 1.0 Low
AV:L/AC:H/Au:S/C:N/I:P/A:N - Weakness
- CWE-345, CWE-347
- Updated
- 2026-11-02
OSV
janmojzis tinyssh Ed25519 Signature crypto_sign_ed25519_tinyssh.c signature verification
A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack's complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17. Upgrading the affected component is recommended.
- Record
CVE-2026-4541- CVSS 4.0
- 1.1 Low
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P - Weakness
- CWE-345, CWE-347
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-4541
A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack's complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17. Upgrading the affected component is recommended.
- Record
DEBIAN-CVE-2026-4541- CVSS 4.0
- 1.1 Low
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/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 - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-4541
A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack's complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17. Upgrading the affected component is recommended.
- Record
UBUNTU-CVE-2026-4541- CVSS 4.0
- 1.1 Low
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P - CVSS 3.1
- 2.5 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
tinysshDebian:13 |
All versions, plus listed versions 20250501-120250501-220260301-120260401-120260601-120260906-1 |
None known |
tinysshDebian:14 |
before 20260301-1, plus listed versions 20250501-120250501-2 |
20260301-1 |
tinysshUbuntu:18.04:LTS |
All versions, plus listed versions 20180101-120180201-1 |
None known |
tinysshUbuntu:20.04:LTS |
All versions, plus listed versions 20190101-1build1 |
None known |
tinysshUbuntu:22.04:LTS |
All versions, plus listed versions 20190101-1build120190101-1ubuntu1 |
None known |
tinysshUbuntu:24.04:LTS |
All versions, plus listed versions 20230101-220230101-320230101-420240101-120240101-2 |
None known |
tinysshUbuntu:25.10 |
All versions, plus listed versions 20250201-120250501-1 |
None known |
tinysshUbuntu:26.10 |
All versions, plus listed versions 20250501-220260601-1 |
None known |
tinysshUbuntu:26.04:LTS |
All versions, plus listed versions 20250501-120250501-2 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-4541 is a low vulnerability (CVSS 2.0) in Janmojzis Tinyssh, published March 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.08%, the 0th percentile. Fixed in tinyssh 20260301-1.
References
vuldb.com/vuln/352358
github.com/janmojzis/tinyssh/issues/101
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nvd.nist.gov/vuln/detail/CVE-2026-4541
security-tracker.debian.org/tracker/CVE-2026-4541
ubuntu.com/security/CVE-2026-4541
cve.org/CVERecord?id=CVE-2026-4541