CVE-2025-15079: libssh global known_hosts override
Noroxi assessment
Priority: Monitor (action score 21/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.55% (FIRST EPSS).
- Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. Special conditions such as timing or configuration are required.
- Fixed version: curl curl 8.14.2, 8.16.1, 8.18.0.
Low priority for now. Upgrade to curl curl 8.14.2, 8.16.1, 8.18.0 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
When doing SSH-based transfers using either SCP or SFTP, and setting the known_hosts file, libcurl could still mistakenly accept connecting to hosts *not present* in the specified file if they were added as recognized in the libssh *global* known_hosts file.
- Published
- Jan 8, 2026
- Updated
- Oct 14, 2026
- EPSS
- 0.5% · 45th percentile
- CWE
- CWE-297
Report tools
Action score
21
Monitor
Low priority for now.
- CVSS
- 21 / 40 · 5.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CISA SSVC decision
- Exploitation
- proof of concept
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| haxx | curl | cpe:2.3:a:haxx:curl |
Check your site's encryption
This vulnerability is about certificate validation or weak cryptography. The free SSL checker tests your certificate, enabled TLS versions and weak ciphers.
Run the SSL checkAffected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- haxx curl7.58.0 and later · before 8.18.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (curl). Independent of NVD's CPE analysis and usually ahead of it.
curl curl
- 8.17.0, 8.16.0, 8.15.0, 8.14.1, 8.14.0, 8.13.0, 8.12.1, 8.12.0, 8.11.1, 8.11.0, 8.10.1, 8.10.0 … (+24)affected
- 7.58.0 and later · before 8.14.2affected · semver
- 8.15.0 and later · before 8.16.1affected · semver
- 8.17.0 and later · before 8.18.0affected · semver
- c92d2e14cfb0db662f958effd2ac86f995cf1b5a and later · before adca486c125d9a6d9565b9607a19dce803a8b479affected · git
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | curl | from 0 | — |
| Debian:14 | curl | before 8.18.0~rc3-1 | 8.18.0~rc3-1 |
| openSUSE:Leap 15.6 | curl | before 8.14.1-150600.4.34.1 | 8.14.1-150600.4.34.1 |
| openSUSE:Leap 16.0 | curl | before 8.14.1-160000.4.1 | 8.14.1-160000.4.1 |
| openSUSE:Tumbleweed | curl | before 8.18.0-1.1 | 8.18.0-1.1 |
| Red Hat:hummingbird:1 | curl | before 0:8.19.0-3.hum1 | 0:8.19.0-3.hum1 |
| Red Hat:hummingbird:1 | libcurl | before 0:8.19.0-3.hum1 | 0:8.19.0-3.hum1 |
| Red Hat:hummingbird:1 | libcurl-devel | before 0:8.19.0-3.hum1 | 0:8.19.0-3.hum1 |
| Red Hat:hummingbird:1 | libcurl-minimal | before 0:8.19.0-3.hum1 | 0:8.19.0-3.hum1 |
| SUSE:Linux Enterprise Micro 5.2 | curl | before 8.14.1-150200.4.97.1 | 8.14.1-150200.4.97.1 |
| SUSE:Linux Enterprise Micro 5.3 | curl | before 8.14.1-150400.5.77.1 | 8.14.1-150400.5.77.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | curl | before 8.14.1-150700.7.8.1 | 8.14.1-150700.7.8.1 |
| SUSE:Linux Enterprise Server 16.0 | curl | before 8.14.1-160000.4.1 | 8.14.1-160000.4.1 |
| SUSE:Linux Enterprise Server 16.0 | curl-mini | before 8.14.1-160000.4.1 | 8.14.1-160000.4.1 |
| SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | curl | before 8.0.1-11.111.1 | 8.0.1-11.111.1 |
| SUSE:Linux Micro 6.0 | curl | before 8.14.1-3.1 | 8.14.1-3.1 |
| SUSE:Linux Micro 6.1 | curl | before 8.14.1-slfo.1.1_4.1 | 8.14.1-slfo.1.1_4.1 |
Same product
haxx: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-22901curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session t51Plan
- CVE-2023-38039When curl retrieves an HTTP response, it stores the incoming headers so that
they can be accessed later via the libcurl headers API.47Plan
- CVE-2024-2398HTTP/2 push headers memory-leak45Plan
Published before and after this one in the same product
- ← EarlierCVE-2025-14524Jan 8, 2026 · bearer token leak on cross-protocol redirect21Monitor
- ← EarlierCVE-2025-14819Jan 8, 2026 · OpenSSL partial chain store policy bypass21Monitor
- Later →CVE-2025-15224Jan 8, 2026 · libssh key passphrase bypass without agent set12Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| curl curl | 8.14.2 | Vendor (CNA) |
| curl curl | 8.16.1 | Vendor (CNA) |
| curl curl | 8.18.0 | Vendor (CNA) |
| curl curl | adca486c125d9a6d9565b9607a19dce803a8b479 | Vendor (CNA) |
| alpine:curl | 0 · Alpine:v3.24 | Package registry (OSV) |
| debian:curl | 8.18.0~rc3-1 · Debian:14 | Package registry (OSV) |
| opensuse:curl | 8.14.1-150600.4.34.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| red hat:curl | 0:8.19.0-3.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| red hat:libcurl | 0:8.19.0-3.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| red hat:libcurl-devel | 0:8.19.0-3.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| red hat:libcurl-minimal | 0:8.19.0-3.hum1 · Red Hat:hummingbird:1 | Package registry (OSV) |
| suse:curl | 8.14.1-150200.4.97.1 · SUSE:Linux Enterprise Micro 5.2 | Package registry (OSV) |
| suse:curl-mini | 8.14.1-160000.4.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- Harry Sintonenfinder
- Daniel Stenbergremediation developer
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2026-12064176 days apartproto-default skips SSH verification30Monitor
- CVE-2026-9547176 days apartSSH improper host validation29Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-297 · Improper Validation of Certificate with Host MismatchCVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (2 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.