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

CVE-2026-107570: Use of Out-of-range Pointer Offset in mutt

LowCVSS 2.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 10/100)

  • 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: 0.15% (FIRST EPSS).
  • Someone with local access to the system can trigger it. No account or password is required. A user must open a link or visit a page. Special conditions such as timing or configuration are required.
  • Fixed version: mutt (Alpine:v3.23) 2.2.16-r1; mutt (Alpine:v3.24) 2.3.2-r1; mutt (Debian:12) 2.2.12-0.1~deb12u2.

Low priority for now. Upgrade to mutt (Alpine:v3.23) 2.2.16-r1; mutt (Alpine:v3.24) 2.3.2-r1; mutt (Debian:12) 2.2.12-0.1~deb12u2 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

heap OOB write in convert_file_from_to() via a crafted Content-Type header allows attacker to OOB write when email is used as a template.

Published
Oct 8, 2026
Updated
Oct 10, 2026
EPSS
0.1% · 4th percentile

Report tools

JSON

Action score

10

Monitor

Low priority for now.

CVSS
10 / 40 · 2.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitLab
2.5
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.

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-2026-107570

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.

—

Versions reported by the vendor

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

  • mutt mutt

    • up to and including 2.4.2affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Alpine:v3.23muttbefore 2.2.16-r12.2.16-r1
Alpine:v3.24muttbefore 2.3.2-r12.3.2-r1
Debian:12muttbefore 2.2.12-0.1~deb12u22.2.12-0.1~deb12u2
Debian:13muttbefore 2.2.13-1+deb13u22.2.13-1+deb13u2
Debian:14muttbefore 2.4.1-1.12.4.1-1.1
openSUSE:Leap 16.0muttbefore 2.2.16-160000.3.12.2.16-160000.3.1
openSUSE:Tumbleweedmuttbefore 2.4.2-2.12.4.2-2.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSmuttbefore 1.10.1-150000.3.32.11.10.1-150000.3.32.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7muttbefore 2.2.14-150600.3.9.12.2.14-150600.3.9.1
SUSE:Linux Enterprise Server 12 SP5-LTSSmuttbefore 1.10.1-55.36.11.10.1-55.36.1
SUSE:Linux Enterprise Server 16.0muttbefore 2.2.16-160000.3.12.2.16-160000.3.1

Same product

mutt: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-14354An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16.
    41Plan
  • CVE-2018-14362An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16.
    40Plan
  • CVE-2018-14359An issue was discovered in Mutt before 1.10.1 and NeoMutt before 2018-07-16.
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-43862May 4, 2026 · In mutt before 2.3.2, the imap_auth_gss security level is mishandled.
    14Monitor
  • ← EarlierCVE-2026-43863May 4, 2026 · mutt before 2.3.2 has an infinite loop in data_object_to_stream in crypt-gpgme.c.
    14Monitor
  • ← EarlierCVE-2026-43864May 4, 2026 · mutt before 2.3.2 has a show_sig_summary NULL pointer dereference.
    10Monitor

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
alpine:mutt2.2.16-r1 · Alpine:v3.23Package registry (OSV)
debian:mutt2.2.12-0.1~deb12u2 · Debian:12Package registry (OSV)
debian:mutt2.2.13-1+deb13u2 · Debian:13Package registry (OSV)
opensuse:mutt2.4.2-2.1 · openSUSE:TumbleweedPackage registry (OSV)
suse:mutt1.10.1-55.36.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:mutt2.2.16-160000.3.1 · SUSE:Linux Enterprise Server 16.0Package 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 recorded+3 d
  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).

Credits

All researchers

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

Not on record for this CVE: patch commit or PR link · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • Special conditions such as timing or configuration are required.

If successful

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

Weakness class (CWE)

CWE-823 · Use of Out-of-range Pointer Offset

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓
  2. SSVC exploitation— → none
  3. Exploit maturity— → none

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.

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