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CVE-2026-24058

Charm Soft Serve authentication bypass

9.8 CRITICALEPSS 0.59%
  1. Published22 Jan 2026

Description

Soft Serve is a self-hostable Git server for the command line. Versions 0.11.2 and below have a critical authentication bypass vulnerability that allows an attacker to impersonate any user (including admin) by "offering" the victim's public key during the SSH handshake before authenticating with their own valid key. This occurs because the user identity is stored in the session context during the "offer" phase and is not cleared if that specific authentication attempt fails. This issue has been fixed in version 0.11.3.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Charm Soft Serve< 0.11.3

Remediation

Fixed in
Charm Soft Serve≥ 0.11.3

References

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Frequently asked

Is CVE-2026-24058 being actively exploited?

CVE-2026-24058 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.59%.

How severe is CVE-2026-24058?

CVE-2026-24058 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.59% probability of exploitation.

Which products are affected by CVE-2026-24058?

Affected products include Charm Soft Serve.

How do I fix CVE-2026-24058?

Upgrade affected software to a fixed version, for example Charm Soft Serve 0.11.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-24058 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.