PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-49760 Erlang CVE debrief

A Stack-based Buffer Overflow vulnerability was discovered in Erlang OTP (erl_interface), specifically in the 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 characters), the buffer overflows. The overflow bytes are restricted to the ASCII values of 0-9 and A-F, which limits exploitation to Denial of Service. This issue affects OTP from OTP 17.0 before 27.3.4.13, 28.5.0.2 and 29.0.2, corresponding to erl_interface from 3.7.16 before 5.5.2.1, 5.7.0.1 and 5.8.1.

Vendor
Erlang
Product
OTP
CVSS
MEDIUM 6.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-15
Advisory published
2026-06-10
Advisory updated
2026-06-15

Who should care

Users of Erlang OTP (erl_interface) versions from OTP 17.0 before 27.3.4.13, 28.5.0.2 and 29.0.2, corresponding to erl_interface from 3.7.16 before 5.5.2.1, 5.7.0.1 and 5.8.1 should be aware of this vulnerability.

Technical summary

The vulnerability is caused by the C function ei_s_print_term, which 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 characters), the buffer overflows.

Defensive priority

MEDIUM

Recommended defensive actions

  • Update to OTP version 27.3.4.13, 28.5.0.2 or 29.0.2, or erl_interface version 5.5.2.1, 5.7.0.1 or 5.8.1.

Evidence notes

The CVE-2026-49760 vulnerability was published on [cve-org](resourceLinkAnnotations.cve-org).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-49760 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-49760

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-49760 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-49760

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://cna.erlef.org/cves/CVE-2026-49760.html

    6b3ad84c-e1a6-4bf7-a703-f496b71e49db

  • Source reference

    Unverified legacy reference

    URL: https://github.com/erlang/otp/commit/0bef277b2d39dc8babb9ceb4f5d0a456f3007111

    6b3ad84c-e1a6-4bf7-a703-f496b71e49db

  • Source reference

    Unverified legacy reference

    URL: https://github.com/erlang/otp/security/advisories/GHSA-xcxj-5pg2-v72j

    6b3ad84c-e1a6-4bf7-a703-f496b71e49db

  • Source reference

    Unverified legacy reference

    URL: https://osv.dev/vulnerability/EEF-CVE-2026-49760

    6b3ad84c-e1a6-4bf7-a703-f496b71e49db

  • Source reference

    Unverified legacy reference

    URL: https://www.erlang.org/doc/system/versions.html

    6b3ad84c-e1a6-4bf7-a703-f496b71e49db

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.