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CVE.org (no NVD analysis yet)· CNA mitre

CVE-2026-107890: OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference caused by repeated IPP group tags in job-creation requests.

MediumCVSS 5.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.14% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: OpenPrinting CUPS 2.4.20; azl3 cups 2.4.19-1 on Azure Linux 3.0 Release Notes; azl3 cups 2.4.19-2 on Azure Linux 3.0 Release Notes.
  • Severity is disputed: the assigning authority (CNA) scores it 3.3, NVD 5.5.

Low priority for now. Upgrade to OpenPrinting CUPS 2.4.20; azl3 cups 2.4.19-1 on Azure Linux 3.0 Release Notes; azl3 cups 2.4.19-2 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference caused by repeated IPP group tags in job-creation requests. IPP parsing creates unnamed separator attributes with IPP_TAG_ZERO, but add_job() converts these separators to IPP_TAG_JOB. During job startup, get_options()/ipp_length() subsequently calls strlen() on a NULL attribute name, terminating cupsd and disrupting all queues. A single crafted Print-Job request can trigger the crash when the client can reach the scheduler and submit jobs to an accepting, enabled queue supporting the submitted document format. Anonymous submission is possible when permitted by listener and access-control configuration.

Published
Oct 9, 2026
Updated
Oct 20, 2026
EPSS
0.1% · 4th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · mitre
3.3
2.2 point gap

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-107890

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
openprintingcups

Versions reported by the vendor

Affected version ranges reported by the assigning authority (mitre). Independent of NVD's CPE analysis and usually ahead of it.

  • OpenPrinting CUPS

    • before 2.4.20affected · semver

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • openprinting cupsbefore 2.4.20

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12cupsfrom 0—
Debian:14cupsbefore 2.4.20-12.4.20-1
Red Hat:hummingbird:1cupsbefore 0:2.4.19-4.5.hum10:2.4.19-4.5.hum1
Red Hat:hummingbird:1cups-clientbefore 0:2.4.19-4.5.hum10:2.4.19-4.5.hum1
Red Hat:hummingbird:1cups-develbefore 0:2.4.19-4.5.hum10:2.4.19-4.5.hum1
Red Hat:hummingbird:1cups-filesystembefore 0:2.4.19-4.5.hum10:2.4.19-4.5.hum1
Red Hat:hummingbird:1cups-ipptoolbefore 0:2.4.19-4.5.hum10:2.4.19-4.5.hum1
Red Hat:hummingbird:1cups-libsbefore 0:2.4.19-4.5.hum10:2.4.19-4.5.hum1
Red Hat:hummingbird:1cups-lpdbefore 0:2.4.19-4.5.hum10:2.4.19-4.5.hum1
Red Hat:hummingbird:1cups-printerappbefore 0:2.4.19-4.5.hum10:2.4.19-4.5.hum1

Same product

openprinting: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-58060cups has Authentication bypass with AuthType Negotiate
    32Monitor
  • CVE-2023-4504OpenPrinting CUPS/libppd Postscript Parsing Heap Overflow
    28Monitor
  • CVE-2023-34241CUPS vulnerable to use-after-free in cupsdAcceptClient()
    28Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-107886Oct 9, 2026 · OpenPrinting CUPS before 2.4.20 contains a double-free in printer-class management.
    26Monitor
  • ← EarlierCVE-2026-107888Oct 9, 2026 · OpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference in cupsdCheckJobs() when a job marked job-held-on-create refers to a…
    22Monitor
  • Later →CVE-2026-55453Oct 15, 2026 · CUPS ipp backend status-line injection can update queue PPD and lead to conditional RCE as lp via foomatic-rip
    13Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
OpenPrinting CUPS2.4.20Vendor (CNA)
azl3 cups 2.4.19-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 cups 2.4.19-2 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:cups2.4.20-1 · Debian:14Package registry (OSV)
red hat:cups0:2.4.19-4.5.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:cups-client0:2.4.19-4.5.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:cups-devel0:2.4.19-4.5.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:cups-filesystem0:2.4.19-4.5.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:cups-ipptool0:2.4.19-4.5.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:cups-libs0:2.4.19-4.5.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:cups-lpd0:2.4.19-4.5.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:cups-printerapp0:2.4.19-4.5.hum1 · Red Hat:hummingbird:1Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 13, 2026+36 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-1078880 days apartOpenPrinting CUPS before 2.4.20 contains a NULL pointer dereference in cupsdCheckJobs() when a job marked job-held-on-create refers to a…
    22Monitor

Not on record for this CVE: patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. CVSS3.3 → 5.5
  2. Severitylow → medium
  3. SSVC exploitation— → poc
  4. Exploit maturity— → none
  5. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

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