CVE-2026-33353: Soft Serve is a self-hostable Git server for the command line

Routine

MEDIUM 6.5UPGRADE

CVE-2026-33353 is a medium-severity flaw (CVSS 6.5) affecting soft serve. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Soft Serve is a self-hostable Git server for the command line. From version 0.6.0 to before version 0.11.6, an authorization flaw in repo import allows any authenticated SSH user to clone a server-local Git repository, including another user's private repo, into a new repository they control. This issue has been patched in version 0.11.6.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 68%)
CISA exploited list	No
Weakness	CWE-200, CWE-862
Published	2026-03-24
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: charm

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-24 20:16 UTCPublished CVE record published
2026-06-17 10:37 UTCUpdated Record last modified

charm soft serve UPGRADE

Affected: >= 0.6.0 and < 0.11.6

Fixed in: 0.11.6

Safe to downgrade to: a release before 0.6.0

1. Check installed version

apt-cache policy soft-serve || rpm -q soft-serve || soft-serve --version

2. UPGRADE to 0.11.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade soft-serve

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade soft-serve

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.6.0 (Debian / Ubuntu)

apt-cache madison soft-serve sudo apt install soft-serve=<VERSION_BEFORE_0.6.0> sudo apt-mark hold soft-serve

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list soft-serve sudo dnf downgrade soft-serve-<VERSION_BEFORE_0.6.0> sudo dnf versionlock add soft-serve

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33353?

soft serve: upgrade to 0.11.6. Exact commands for each OS are on this page.

Is CVE-2026-33353 being exploited?

CVE-2026-33353 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33353 affect?

CVE-2026-33353 affects soft serve. Severity is medium (CVSS 6.5). Soft Serve is a self-hostable Git server for the command line. From version 0.6.0 to before version 0.11.6, an authorization flaw in repo import allows any authenticated SSH user to clone a server-local Git repository, including another use

How urgent is CVE-2026-33353?

Priority 36/100. Public exploit reference

Software pages

Git vulnerabilities

References

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