CVE-2026-107570

Use of Out-of-range Pointer Offset in mutt

2.5 LowFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: High
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

0.15%Unchanged since Oct 9, 2026

What each source reports

CVE List Score used 2.5

Use of Out-of-range Pointer Offset in mutt

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.

Record: CVE-2026-107570
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness: CWE-823
Updated: 2026-11-02

EUVDEUVD-2026-94853 2.5

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.

Record: EUVD-2026-94853
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-3756-2mxq-33pr 2.5

heap OOB write in convert_file_from_to() via a crafted Content-Type header allows attacker to OOB...

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.

Record: GHSA-3756-2mxq-33pr
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness: CWE-823
Updated: 2026-11-02

NVD 2.5

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.

Record: CVE-2026-107570
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness: CWE-823
Updated: 2026-11-02

OSVALPINE-CVE-2026-107570 2.5

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.

Record: ALPINE-CVE-2026-107570
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-03

OSV 2.5

Use of Out-of-range Pointer Offset in mutt

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.

Record: CVE-2026-107570
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Weakness: CWE-823
Updated: 2026-11-02

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OSVDEBIAN-CVE-2026-107570 2.5

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.

Record: DEBIAN-CVE-2026-107570
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVOESA-2026-4644 2.5

mutt security update

Mutt is a small but very powerful text-based mail client for Unix operating systems.

Security Fix(es):

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.(CVE-2026-107570)

Record: OESA-2026-4644
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVOESA-2026-4645 2.5

mutt security update

Mutt is a small but very powerful text-based mail client for Unix operating systems.

Security Fix(es):

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.(CVE-2026-107570)

Record: OESA-2026-4645
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVOESA-2026-4646 2.5

mutt security update

Mutt is a small but very powerful text-based mail client for Unix operating systems.

Security Fix(es):

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.(CVE-2026-107570)

Record: OESA-2026-4646
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVOESA-2026-4647 2.5

mutt security update

Mutt is a small but very powerful text-based mail client for Unix operating systems.

Security Fix(es):

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.(CVE-2026-107570)

Record: OESA-2026-4647
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2026-107570 2.5

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.

Record: UBUNTU-CVE-2026-107570
CVSS 3.1: 2.5 LowCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVAZL-106736 No score

CVE-2026-107570 affecting package mutt 2.2.12-1

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.

Record: AZL-106736
Updated: 2026-11-05

OSVCLSA-2026-1792092200 No score

mutt: Fix of CVE-2026-107570

CVE-2026-107570: fix heap out-of-bounds write in convert_file_from_to() when the colon-separated charset list contains a zero-length entry

Record: CLSA-2026-1792092200
Updated: 2026-11-02

OSVCLSA-2026-1792567671 No score

mutt: Fix of 2 CVEs

CVE-2026-43861: reject embedded nul in url_pct_decode()
CVE-2026-107570: fix out-of-bounds heap write in convert_file_from_to()

Record: CLSA-2026-1792567671
Updated: 2026-11-02

OSVMGASA-2026-0517 No score

Updated mutt package fixes a security vulnerability

When an email is processed as a template, an out-of-bounds write vulnerability in the convert_file_from_to () function can be triggered by a specially crafted Content-Type header (CVE-2026-107570).

Record: MGASA-2026-0517
Updated: 2026-11-02

OSVopenSUSE-SU-2026:12094-1 No score

mutt-2.4.2-2.1 on GA media

These are all security issues fixed in the mutt-2.4.2-2.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2026:12094-1
Updated: 2026-11-02

OSVopenSUSE-SU-2026:22099-1 No score

Security update for mutt

This update for mutt fixes the following issue:

CVE-2026-107570: heap out-of-bounds write in convert_file_from_to() via a crafted Content-Type header (bsc#1284739).

Record: openSUSE-SU-2026:22099-1
Updated: 2026-11-02

OSVSUSE-SU-2026:24242-1 No score

Security update for mutt

This update for mutt fixes the following issue:

CVE-2026-107570: heap out-of-bounds write in convert_file_from_to() via a crafted Content-Type header (bsc#1284739).

Record: SUSE-SU-2026:24242-1
Updated: 2026-11-02

OSVSUSE-SU-2026:4685-1 No score

Security update for mutt

This update for mutt fixes the following issue:

CVE-2026-107570: heap out-of-bounds write in convert_file_from_to() via a crafted Content-Type header (bsc#1284739).

Record: SUSE-SU-2026:4685-1
Updated: 2026-11-02

OSVSUSE-SU-2026:4818-1 No score

Security update for mutt

This update for mutt fixes the following issue:

CVE-2026-107570: heap out-of-bounds write in convert_file_from_to() via a crafted Content-Type header (bsc#1284739).

Record: SUSE-SU-2026:4818-1
Updated: 2026-11-02

OSVSUSE-SU-2026:4857-1 No score

Security update for mutt

This update for mutt fixes the following issue:

CVE-2026-107570: heap out-of-bounds write in convert_file_from_to() via a crafted Content-Type header (bsc#1284739).

Record: SUSE-SU-2026:4857-1
Updated: 2026-11-02

Affected products

mutt

Affected packages

Affected packages
Package	Affected	Fixed
`mutt` Alpine:v3.23	before 2.2.16-r1	2.2.16-r1
`mutt` Alpine:v3.24	before 2.3.2-r1	2.3.2-r1
`mutt` Azure Linux:3	through 2.2.12-1	None known
`mutt` TuxCare:AlmaLinux:9.6	before 5:2.2.6-2.el9_6.tuxcare.els5	5:2.2.6-2.el9_6.tuxcare.els5
`mutt` TuxCare:AlmaLinux:9.2 From an advisory covering 2 CVEs	before 5:2.2.6-1.el9_2.tuxcare.els5	5:2.2.6-1.el9_2.tuxcare.els5
`mutt` Debian:12	All versions, plus listed versions 2.2.12-0.12.2.12-0.1~deb12u12.2.13-12.2.9-12.2.9-1+deb12u1 Show 4 moreShow less 2.3.2-12.4.0-12.4.1-12.4.1-1.1	None known
`mutt` Debian:13	before 2.2.13-1+deb13u2, plus listed versions 2.2.13-12.2.13-1+deb13u1	2.2.13-1+deb13u2
`mutt` Debian:14	before 2.4.1-1.1, plus listed versions 2.2.13-12.3.2-12.4.0-12.4.1-1	2.4.1-1.1
`mutt` Mageia:10	before 2.4.3-1.mga10	2.4.3-1.mga10
`mutt` openEuler:22.03-LTS-SP4	before 2.2.12-5.oe2203sp4	2.2.12-5.oe2203sp4

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Affected packages
Package	Affected	Fixed
`mutt` openEuler:24.03-LTS-SP1	before 2.2.12-5.oe2403sp1	2.2.12-5.oe2403sp1
`mutt` openEuler:24.03-LTS-SP3	before 2.2.12-5.oe2403sp3	2.2.12-5.oe2403sp3
`mutt` openEuler:24.03-LTS-SP4	before 2.3.2-2.oe2403sp4	2.3.2-2.oe2403sp4
`mutt` SUSE:Linux Enterprise Server 16.0	before 2.2.16-160000.3.1	2.2.16-160000.3.1
`mutt` SUSE:Linux Enterprise Server for SAP applications 16.0	before 2.2.16-160000.3.1	2.2.16-160000.3.1
`mutt` SUSE:Linux Enterprise Server 12 SP5-LTSS	before 1.10.1-55.36.1	1.10.1-55.36.1
`mutt` SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5	before 1.10.1-55.36.1	1.10.1-55.36.1
`mutt` SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS	before 1.10.1-150000.3.32.1	1.10.1-150000.3.32.1
`mutt` SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS	before 1.10.1-150000.3.32.1	1.10.1-150000.3.32.1
`mutt` SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS	before 1.10.1-150000.3.32.1	1.10.1-150000.3.32.1
`mutt` SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS	before 1.10.1-150000.3.32.1	1.10.1-150000.3.32.1
`mutt` SUSE:Linux Enterprise Server 15 SP4-LTSS	before 1.10.1-150000.3.32.1	1.10.1-150000.3.32.1
`mutt` SUSE:Linux Enterprise Server 15 SP5-LTSS	before 1.10.1-150000.3.32.1	1.10.1-150000.3.32.1
`mutt` SUSE:Linux Enterprise Server for SAP Applications 15 SP4	before 1.10.1-150000.3.32.1	1.10.1-150000.3.32.1
`mutt` SUSE:Linux Enterprise Server for SAP Applications 15 SP5	before 1.10.1-150000.3.32.1	1.10.1-150000.3.32.1
`mutt` SUSE:Linux Enterprise Module for Basesystem 15 SP7	before 2.2.14-150600.3.9.1	2.2.14-150600.3.9.1
`mutt` SUSE:Linux Enterprise Server 15 SP6-LTSS	before 2.2.14-150600.3.9.1	2.2.14-150600.3.9.1
`mutt` SUSE:Linux Enterprise Server for SAP Applications 15 SP6	before 2.2.14-150600.3.9.1	2.2.14-150600.3.9.1
`mutt` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 1.5.23-3.1ubuntu11.5.23-3.1ubuntu21.5.24-11.5.24-1build11.5.24-1ubuntu0.1 Show 7 moreShow less 1.5.24-1ubuntu0.21.5.24-1ubuntu0.31.5.24-1ubuntu0.41.5.24-1ubuntu0.51.5.24-1ubuntu0.61.5.24-1ubuntu0.6+esm21.5.24-1ubuntu0.6+esm3	None known
`mutt` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 1.8.3+neomutt20170609-2build11.9.1-21.9.1-31.9.1-41.9.1-5 Show 11 moreShow less 1.9.2-11.9.3-11.9.4-21.9.4-31.9.4-3ubuntu0.11.9.4-3ubuntu0.21.9.4-3ubuntu0.31.9.4-3ubuntu0.41.9.4-3ubuntu0.51.9.4-3ubuntu0.61.9.4-3ubuntu0.6+esm1	None known
`mutt` Ubuntu:20.04:LTS	All versions, plus listed versions 1.10.1-2.11.12.2-11.12.2-21.13.0-11.13.2-1 Show 6 moreShow less 1.13.2-1ubuntu0.11.13.2-1ubuntu0.21.13.2-1ubuntu0.31.13.2-1ubuntu0.41.13.2-1ubuntu0.51.13.2-1ubuntu0.6	None known
`mutt` Ubuntu:22.04:LTS	All versions, plus listed versions 2.0.5-4.1build12.1.3-12.1.4-12.1.4-1build12.1.4-1ubuntu1.12.1.4-1ubuntu1.2	None known
`mutt` Ubuntu:24.04:LTS	All versions, plus listed versions 2.2.9-12.2.9-1ubuntu0.23.10.12.2.12-0.12.2.12-0.1build22.2.12-0.1build32.2.12-0.1build4	None known
`mutt` Ubuntu:26.10	All versions, plus listed versions 2.2.13-1build22.3.2-12.4.0-12.4.1-1	None known
`mutt` Ubuntu:26.04:LTS	All versions, plus listed versions 2.2.13-12.2.13-1build12.2.13-1build2	None known
`mutt` openSUSE:Tumbleweed	before 2.4.2-2.1	2.4.2-2.1
`mutt` openSUSE:Leap 16.0	before 2.2.16-160000.3.1	2.2.16-160000.3.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected
Nov 5, 2026	facts	OSV
Nov 3, 2026	affected, aliases, references	OSV
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2026-107570 is a low vulnerability (CVSS 2.5) in Mutt, published October 8, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.15%, the 4th percentile. Fixed in mutt 2.2.16-r1.

References

Show 20 moreShow less