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CVE-2026-44055

Bitwise OR logic bug enables shell injection

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.36%Up 0.1 points since May 21, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.5

Bitwise OR logic bug enables shell injection

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.

Record
CVE-2026-44055
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-78
Updated
2026-11-02
EUVDEUVD-2026-31230 7.5

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.

Record
EUVD-2026-31230
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-2jff-6g6p-wr79 7.5

A logic error involving bitwise OR operations in Netatalk 3.1.4 through 4.4.2 allows a remote...

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.

Record
GHSA-2jff-6g6p-wr79
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-78
Updated
2026-11-02
NVD 7.5

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.

Record
CVE-2026-44055
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-78
Updated
2026-11-02
OSVALPINE-CVE-2026-44055 7.5

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.

Record
ALPINE-CVE-2026-44055
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
OSVDEBIAN-CVE-2026-44055 7.5

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.

Record
DEBIAN-CVE-2026-44055
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-44055 7.5

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.

Record
UBUNTU-CVE-2026-44055
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUSN-8395-1 No score

netatalk vulnerabilities

Arjun Basnet discovered that Netatalk incorrectly sanitized user input in its MySQL CNID backend. A remote authenticated attacker could possibly use this issue to conduct SQL injection attacks. (CVE-2026-44047)

Arjun Basnet discovered that Netatalk incorrectly handled UCS-2 character set conversion. A remote authenticated attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-44048)

Arjun Basnet discovered that Netatalk improperly handled null termination during character set conversion. A remote authenticated attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-44049)

Arjun Basnet discovered that the Netatalk CNID daemon improperly handled request-supplied name lengths. A local attacker could possibly use this issue to cause a denial of service or execute arbitrary code with escalated privileges. (CVE-2026-44050)

Arjun Basnet discovered that Netatalk improperly resolved symbolic links. A remote authenticated attacker could possibly use this issue to read or overwrite arbitrary files on the system. (CVE-2026-44051)

Arjun Basnet discovered that Netatalk incorrectly handled logging when performing LDAP simple-bind operations. A local attacker could possibly use this issue to obtain sensitive information. (CVE-2026-44052)

Arjun Basnet discovered that Netatalk contained an operator precedence logic error when processing input. A remote authenticated attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-44055)

Arjun Basnet discovered that Netatalk incorrectly handled DSI write requests. A remote unauthenticated attacker could possibly use this issue to cause a denial of service. (CVE-2026-44060)

Arjun Basnet discovered that Netatalk incorrectly validated output lengths when converting character sets. A remote authenticated attacker could possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-44062)

Arjun Basnet discovered that Netatalk incorrectly handled length validation when parsing certain session identifiers. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-44064)

Record
USN-8395-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
netatalk
Alpine:v3.24
before 4.4.3-r0
4.4.3-r0
netatalk
Debian:13
before 4.2.3~ds-1+deb13u2, plus listed versions
4.2.3~ds-14.2.3~ds-1+deb13u1
4.2.3~ds-1+deb13u2
netatalk
Debian:14
before 4.4.3~ds-1, plus listed versions
4.2.3~ds-14.2.3~ds-24.2.3~ds-2.14.4.1~ds-14.4.2~ds-1
4.4.3~ds-1
netatalk
Ubuntu:25.10
All versions, plus listed versions
4.1.2~ds-44.2.1~ds-14.2.3~ds-1
None known
netatalk
Ubuntu:26.04:LTS
before 4.2.3~ds-2.1ubuntu0.1, plus listed versions
4.2.3~ds-14.2.3~ds-24.2.3~ds-2.1
4.2.3~ds-2.1ubuntu0.1
netatalk
Ubuntu:Pro:14.04:LTS
From an advisory covering 10 CVEs
before 2.2.2-1ubuntu2.2+esm3, plus listed versions
2.2.2-1ubuntu12.2.2-1ubuntu22.2.2-1ubuntu2.22.2.2-1ubuntu2.2+esm12.2.2-1ubuntu2.2+esm2
2.2.2-1ubuntu2.2+esm3
netatalk
Ubuntu:Pro:16.04:LTS
From an advisory covering 10 CVEs
before 2.2.5-1ubuntu0.2+esm3, plus listed versions
2.2.5-12.2.5-1ubuntu0.22.2.5-1ubuntu0.2+esm12.2.5-1ubuntu0.2+esm2
2.2.5-1ubuntu0.2+esm3
netatalk
Ubuntu:Pro:18.04:LTS
From an advisory covering 10 CVEs
before 2.2.6-1ubuntu0.18.04.2+esm3, plus listed versions
2.2.6-12.2.6-1ubuntu0.18.04.22.2.6-1ubuntu0.18.04.2+esm12.2.6-1ubuntu0.18.04.2+esm2
2.2.6-1ubuntu0.18.04.2+esm3
netatalk
Ubuntu:Pro:20.04:LTS
From an advisory covering 10 CVEs
before 3.1.12~ds-4ubuntu0.20.04.4+esm1, plus listed versions
3.1.12~ds-33.1.12~ds-43.1.12~ds-4ubuntu0.20.04.13.1.12~ds-4ubuntu0.20.04.33.1.12~ds-4ubuntu0.20.04.3+esm13.1.12~ds-4ubuntu0.20.04.4
3.1.12~ds-4ubuntu0.20.04.4+esm1
netatalk
Ubuntu:Pro:22.04:LTS
From an advisory covering 10 CVEs
before 3.1.12~ds-9ubuntu0.22.04.4+esm1, plus listed versions
3.1.12~ds-93.1.12~ds-9build13.1.12~ds-9ubuntu0.22.04.13.1.12~ds-9ubuntu0.22.04.33.1.12~ds-9ubuntu0.22.04.3+esm13.1.12~ds-9ubuntu0.22.04.4
3.1.12~ds-9ubuntu0.22.04.4+esm1
netatalk
Ubuntu:Pro:24.04:LTS
From an advisory covering 10 CVEs
before 3.1.18~ds-1ubuntu0.1~esm2, plus listed versions
3.1.15~ds-1ubuntu13.1.18~ds-13.1.18~ds-1build23.1.18~ds-1build43.1.18~ds-1ubuntu0.1~esm1
3.1.18~ds-1ubuntu0.1~esm2
netatalk
Ubuntu:26.04:LTS
From an advisory covering 10 CVEs
before 4.2.3~ds-2.1ubuntu0.1, plus listed versions
4.2.3~ds-14.2.3~ds-24.2.3~ds-2.1
4.2.3~ds-2.1ubuntu0.1

History

History
RecordedChangedSources
affected, facts
affected, aliases, referencesOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-44055 is a high vulnerability (CVSS 7.5) in Netatalk, published May 21, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.36%, the 29th percentile. Fixed in netatalk 4.4.3-r0.

References

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