CVE-2026-49760: Stack-based Buffer Overflow vulnerability in Erlang OTP (erl_interface) allows Stack-based Buffer Overflow. T

Routine

MEDIUM 5.5UPGRADEUPGRADE

CVE-2026-49760 is a medium-severity flaw (CVSS 5.5) affecting erl interface, erlang\/otp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based Buffer Overflow vulnerability in Erlang OTP (erl_interface) allows Stack-based Buffer Overflow. This vulnerability is associated with program file lib/erl_interface/src/misc/ei_printterm.c and program routine ei_s_print_term. The C function ei_s_print_term uses an internal 2000-character stack buffer to format terms. When called with an encoded Erlang term containing a very large integer (encoded representation exceeding 2000 charac

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-121
Published	2026-06-10
Last modified	2026-10-26

Publisher (CNA): EEF · Vendor: erlang

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-10 16:17 UTCPublished CVE record published
2026-10-26 11:10 UTCUpdated Record last modified

erlang erl interface UPGRADE

Affected: >= 3.7.16 and < 5.5.2.1 · >= 5.7 and < 5.7.0.1 · >= 5.8 and < 5.8.1

Fixed in: 5.5.2.1, 5.7.0.1, 5.8.1

Safe to downgrade to: a release before 3.7.16

1. Check installed version

apt-cache policy erl-interface || rpm -q erl-interface || erl-interface --version

2. UPGRADE to 5.5.2.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade erl-interface

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade erl-interface

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.7.16 (Debian / Ubuntu)

apt-cache madison erl-interface sudo apt install erl-interface=<VERSION_BEFORE_3.7.16> sudo apt-mark hold erl-interface

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list erl-interface sudo dnf downgrade erl-interface-<VERSION_BEFORE_3.7.16> sudo dnf versionlock add erl-interface

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

erlang erlang\/otp UPGRADE

Affected: >= 17.0 and < 27.3.4.13 · >= 28.0 and < 28.5.0.2 · >= 29.0 and < 29.0.2

Fixed in: 27.3.4.13, 28.5.0.2, 29.0.2

Safe to downgrade to: a release before 17.0

1. Check installed version

apt-cache policy erlangotp || rpm -q erlangotp || erlangotp --version

2. UPGRADE to 27.3.4.13 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade erlangotp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade erlangotp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 17.0 (Debian / Ubuntu)

apt-cache madison erlangotp sudo apt install erlangotp=<VERSION_BEFORE_17.0> sudo apt-mark hold erlangotp

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list erlangotp sudo dnf downgrade erlangotp-<VERSION_BEFORE_17.0> sudo dnf versionlock add erlangotp

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-49760?

erl interface: upgrade to 5.5.2.1, 5.7.0.1, 5.8.1; erlang\/otp: upgrade to 27.3.4.13, 28.5.0.2, 29.0.2. Exact commands for each OS are on this page.

Is CVE-2026-49760 being exploited?

CVE-2026-49760 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-49760 affect?

CVE-2026-49760 affects erl interface, erlang\/otp. Severity is medium (CVSS 5.5). Stack-based Buffer Overflow vulnerability in Erlang OTP (erl_interface) allows Stack-based Buffer Overflow. This vulnerability is associated with program file lib/erl_interface/src/misc/ei_printterm.c and program routine ei_s_print_term.

How urgent is CVE-2026-49760?

Priority 20/100. No elevated risk signals yet.

References

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