CVE-2026-44055: netatalk OS Command Injection
CVSS: 7.5v3.1HighDeferred
AliasesUBUNTU-CVE-2026-44055DEBIAN-CVE-2026-44055
Published 21-05-2026Last modified 22-05-2026
Vulnerability summary
CVE-2026-44055 is a high (CVSS 7.5) OS Command Injection vulnerability in netatalk. EPSS estimates a 0.61% chance of exploitation in the next 30 days, higher than 48.2% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
0.61%
0%100%
Low · +0.25 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 21-05-2026PublishedVulnerability first disclosed.
- 22-05-2026Last modifiedVulnerability information updated.
Description
A logic error involving bitwise OR operations in Netatalk 3.1.4 through 4.4.2 allows a remote authenticated attacker to inject OS commands and execute arbitrary code.
CVSS metrics
4 scores · 4 sources · 1 versionHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.61%
Chance of exploitation in the next 30 days
Percentile
48%
Versus all other CVEs
30-day change
+0.25 pp
From 0.36% on 20-09-2026
20-09-202620-10-2026
EPSS score0.61%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- netatalk< 4.2.3~ds-1+deb13u2 | < 4.4.3~ds-1
Netatalk1 product
- netatalk≥ 3.1.4, ≤ 4.4.2
Ubuntu1 product
- netatalkAll versions (No fix recorded) | < 4.2.3~ds-2.1ubuntu0.1
3 vendors · 3 products
