CVE-2026-47121: Sparkle is a software update framework for macOS

Q: How do I fix CVE-2026-47121?

sparkle: upgrade to 2.9.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-47121 being exploited?

CVE-2026-47121 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-47121 affect?

CVE-2026-47121 affects sparkle. Severity is medium (CVSS 6.1). Sparkle is a software update framework for macOS. Prior to version 2.9.2, `Autoupdate/SUBinaryDeltaApply.m` enforces `relativePath.pathComponents containsObject:@".."` and rejects writes whose immediate parent directory IS itself a symbolic

Q: How urgent is CVE-2026-47121?

Priority 28/100. No elevated risk signals yet.

Routine

MEDIUM 6.1UPGRADE

CVE-2026-47121 is a medium-severity flaw (CVSS 6.1) affecting sparkle. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Sparkle is a software update framework for macOS. Prior to version 2.9.2, `Autoupdate/SUBinaryDeltaApply.m` enforces `relativePath.pathComponents containsObject:@".."` and rejects writes whose immediate parent directory IS itself a symbolic link, but does not detect symlinks deeper in the relative path. `Autoupdate/SPUSparkleDeltaArchive.m`'s `extractItem:` will create symlinks in the destination tree from archive content (no `..` check on the sy

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 74%)
CISA exploited list	No
Weakness	CWE-22, CWE-59
Published	2026-07-21
Last modified	2026-10-24

Publisher (CNA): GitHub, Inc. · Vendor: sparkle-project

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-21 14:16 UTCPublished CVE record published
2026-10-24 20:10 UTCUpdated Record last modified

sparkle-project sparkle UPGRADE

Affected: < 2.9.2

Fixed in: 2.9.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy sparkle || rpm -q sparkle || sparkle --version

2. UPGRADE to 2.9.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sparkle

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sparkle

Note

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

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-2026-47121?

sparkle: upgrade to 2.9.2. Exact commands for each OS are on this page.

Is CVE-2026-47121 being exploited?

CVE-2026-47121 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-2026-47121 affect?

CVE-2026-47121 affects sparkle. Severity is medium (CVSS 6.1). Sparkle is a software update framework for macOS. Prior to version 2.9.2, `Autoupdate/SUBinaryDeltaApply.m` enforces `relativePath.pathComponents containsObject:@".."` and rejects writes whose immediate parent directory IS itself a symbolic

How urgent is CVE-2026-47121?

Priority 28/100. No elevated risk signals yet.

Software pages

macOS vulnerabilities

Related CVEs

CVE-2026-47122 MEDIUM 4.2 UPGRADE Sparkle is a software update framework for macOS

References

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