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    CVE-2026-46595

    Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of callback is passed other than public key, then the source-address validation would be skipped.

    Published:May 22, 2026
    Last Modified:Aug 31, 2026
    EPS:May 22, 2026
    EPSS Score:0.00503
    CVSS Score:10

    Affected Products

    Vendor
    Golang
    Product
    Crypto
    Vendor
    Golang
    Product
    Ssh

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-90 Reflection Attack in Authentication Protocol

    Related CVEs

    CVE-2026-56855 (CVSS 7.5) — Previously, after a channel has been established, a malicious peer could send crafted messages that would dead…
    CVE-2026-78662 (CVSS 7.5) — Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer…
    CVE-2026-56854 (CVSS 7.5) — The source-address critical option in the Permissions returned by an authentication callback was only enforced…
    CVE-2026-46598 (CVSS 5.3) — For certain crafted inputs, a 'ed25519.PrivateKey' was created by casting malformed wire bytes, leading to a p…
    CVE-2026-42508 (CVSS 9.1) — Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the…
    CVE-2026-39834 (CVSS 9.1) — When writing data larger than 4GB in a single Write call on an SSH channel, an integer overflow in the interna…
    CVE-2026-39831 (CVSS 9.1) — The Verify() method for FIDO/U2F security key types ([email protected], sk-ssh-ed25519@openss…
    CVE-2026-39829 (CVSS 7.5) — The RSA and DSA public key parsers did not enforce size limits on key parameters. A crafted public key with an…
    CVE-2026-39830 (CVSS 9.1) — A malicious SSH peer could send unsolicited global request responses to fill an internal buffer, blocking the …
    CVE-2026-39827 (CVSS 6.5) — An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded…

    References

    https://go.dev/cl/781642
    https://go.dev/issue/79570
    https://groups.google.com/g/golang-announce/c/a082jnz-LvI
    https://pkg.go.dev/vuln/GO-2026-5023
    https://access.redhat.com/errata/RHSA-2026:23262
    https://access.redhat.com/errata/RHSA-2026:23264
    https://access.redhat.com/errata/RHSA-2026:26546
    https://access.redhat.com/errata/RHSA-2026:26547
    https://access.redhat.com/errata/RHSA-2026:30650
    https://access.redhat.com/errata/RHSA-2026:30651
    https://access.redhat.com/errata/RHSA-2026:33524
    https://access.redhat.com/errata/RHSA-2026:33531
    https://access.redhat.com/errata/RHSA-2026:36207
    https://access.redhat.com/errata/RHSA-2026:36648
    https://access.redhat.com/errata/RHSA-2026:36651
    https://access.redhat.com/errata/RHSA-2026:36796
    https://access.redhat.com/errata/RHSA-2026:36797
    https://access.redhat.com/errata/RHSA-2026:36808
    https://access.redhat.com/errata/RHSA-2026:36820
    https://access.redhat.com/errata/RHSA-2026:37275
    https://access.redhat.com/errata/RHSA-2026:37387
    https://access.redhat.com/errata/RHSA-2026:40118
    https://access.redhat.com/errata/RHSA-2026:40945
    https://access.redhat.com/errata/RHSA-2026:41019
    https://access.redhat.com/errata/RHSA-2026:41036
    https://access.redhat.com/errata/RHSA-2026:42796
    https://access.redhat.com/errata/RHSA-2026:43692
    https://access.redhat.com/errata/RHSA-2026:47737
    https://access.redhat.com/errata/RHSA-2026:48151
    https://access.redhat.com/errata/RHSA-2026:51033
    https://access.redhat.com/errata/RHSA-2026:54531
    https://access.redhat.com/errata/RHSA-2026:59467
    https://access.redhat.com/errata/RHSA-2026:59558
    https://access.redhat.com/errata/RHSA-2026:60520
    https://access.redhat.com/errata/RHSA-2026:61314
    https://access.redhat.com/security/cve/CVE-2026-46595
    https://bugzilla.redhat.com/show_bug.cgi?id=2480689
    https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46595.json

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High