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NVD / CVE Program· CNA openjs

CVE-2026-5078: morgan vulnerable to Log Forging via unneutralized control characters in :remote-user

Noroxi assessment

Priority: Monitor (action score 21/100)

  • 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: 0.33% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: node-morgan (Debian:14) 1.12.0+~1.9.10-1; morgan (npm) 1.11.0; nodejs24 (Red Hat:hummingbird:1) 0:24.18.0-0.3.hum1.

Low priority for now. Upgrade to node-morgan (Debian:14) 1.12.0+~1.9.10-1; morgan (npm) 1.11.0; nodejs24 (Red Hat:hummingbird:1) 0:24.18.0-0.3.hum1 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

Impact: The morgan logging middleware's :remote-user token extracts the Basic auth username from the Authorization request header and writes it to the log stream without neutralizing control characters. An unauthenticated attacker can send a crafted Authorization Basic header containing CR or LF bytes to inject forged log lines, breaking the one-request-per-line structure of access logs and enabling log forgery against downstream log consumers. The built-in combined, common, default, and short formats are affected, as well as any custom format that references :remote-user. Affected versions: morgan 1.2.0 through 1.10.1. Patches: upgrade to morgan 1.11.0, which neutralizes control characters in the :remote-user token output. Workarounds: use a custom format string that does not include :remote-user.

MediumCVSS 5.3 · v3.1—No exploit Fix available
Published
Jun 3, 2026
Updated
Jul 22, 2026
EPSS
0.3% · 26th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · openjs
5.3
NVD has not scored this yet; the score shown is the CNA’s.

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

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

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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
morgan projectmorgan

Affected versions

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

  • morgan project morgan1.2.0 and later · before 1.11.0

Versions reported by the vendor

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

  • morgan morgan

    • 1.11.0not affected
    • 1.2.0 and later · up to and including 1.10.1affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12node-morganfrom 0—
Debian:14node-morganbefore 1.12.0+~1.9.10-11.12.0+~1.9.10-1
npmmorganfrom 1.2.0 · before 1.11.01.11.0
Red Hat:hummingbird:1nodejs24before 0:24.18.0-0.3.hum10:24.18.0-0.3.hum1
Red Hat:hummingbird:1nodejs24-binbefore 0:24.18.0-0.3.hum10:24.18.0-0.3.hum1
Red Hat:hummingbird:1nodejs24-develbefore 0:24.18.0-0.3.hum10:24.18.0-0.3.hum1
Red Hat:hummingbird:1nodejs24-docsbefore 0:24.18.0-0.3.hum10:24.18.0-0.3.hum1
Red Hat:hummingbird:1nodejs24-full-i18nbefore 0:24.18.0-0.3.hum10:24.18.0-0.3.hum1
Red Hat:hummingbird:1nodejs24-libsbefore 0:24.18.0-0.3.hum10:24.18.0-0.3.hum1
Red Hat:hummingbird:1nodejs24-npmbefore 0:11.16.0-1.24.18.0.0.3.hum10:11.16.0-1.24.18.0.0.3.hum1
Red Hat:hummingbird:1nodejs24-npm-binbefore 0:24.18.0-0.3.hum10:24.18.0-0.3.hum1
Red Hat:hummingbird:1v8-13.6-develbefore 0:13.6.233.17-1.24.18.0.0.3.hum10:13.6.233.17-1.24.18.0.0.3.hum1

Same product

morgan project: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-5413An attacker can use the format parameter to inject arbitrary commands in the npm package morgan < 1.9.1.
    40Plan
  • CVE-2026-15603morgan vulnerable to Log Forging via unescaped Unicode line separators
    21Monitor

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
debian:node-morgan1.12.0+~1.9.10-1 · Debian:14Package registry (OSV)
npm:morgan1.11.0Package registry (OSV)
red hat:nodejs240:24.18.0-0.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-bin0:24.18.0-0.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-devel0:24.18.0-0.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-docs0:24.18.0-0.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-full-i18n0:24.18.0-0.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-libs0:24.18.0-0.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-npm0:11.16.0-1.24.18.0.0.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:nodejs24-npm-bin0:24.18.0-0.3.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:v8-13.6-devel0:13.6.233.17-1.24.18.0.0.3.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.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

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

  • CVE-2026-1560386 days apartmorgan vulnerable to Log Forging via unescaped Unicode line separators
    21Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-117 · Improper Output Neutralization for Logs

CVSS vector

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

nvd-secondary

Attack context

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

Change log

  1. Fix✗ → ✓

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

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records