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Fencer Intel
low 2.5

CVE-2026-107570 json

Use of Out-of-range Pointer Offset in mutt

published last mo. modified last mo. also EUVD-2026-94853

cvss
2.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 4%
public exploits
0
none known

Summary

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.

Patch / fix

  • mutt mutt 2.4.3
  • mutt Debian 13 2.2.13-1+deb13u2
  • mutt Debian 14 2.4.1-1.1

debian advisories DEBIAN-CVE-2026-107570

  • mutt SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Basesystem 15 SP7 2.2.14-150600.3.9.1
  • mutt SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 1.10.1-150000.3.32.1
  • mutt SLES for SAP applications 16.0, SLES 16.0 2.2.16-160000.3.1
  • mutt SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 1.10.1-55.36.1

suse advisories SUSE-SU-2026:4857-1SUSE-SU-2026:4818-1SUSE-SU-2026:4685-1SUSE-SU-2026:24242-1

  • mutt openSUSE Leap 16.0 2.2.16-160000.3.1
  • mutt openSUSE Tumbleweed 2.4.2-2.1

opensuse advisories openSUSE-SU-2026:22099-1openSUSE-SU-2026:12094-1

  • mutt Alpine 3.23 2.2.16-r1
  • mutt Alpine 3.24 2.3.2-r1

alpine advisories ALPINE-CVE-2026-107570

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2026-107570 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-107570 updated cvss 2.5

mutt: mutt: Memory corruption via crafted Content-Type header in email template

  • Red Hat Enterprise Linux 6 mutt, mutt 2.2.13-4.el10
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 mutt, mutt 2.2.13-4.el10 Red Hat Enterprise Linux 8 mutt, mutt 2.2.13-4.el10 Red Hat Enterprise Linux 9 mutt, mutt 2.2.13-4.el10 Red Hat Enterprise Linux 10 mutt 2.2.13-4.el10
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last mo.

Exploit prediction

0.15% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 2.5 CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

Affected products

  • mutt mutt

Classification

Weakness
  • CWE-823 Use of Out-of-range Pointer Offset

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.