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CVE-2026-49760— Stack Buffer Overflow in ei_s_print_term at Very Large Integer

Quick assessment

Affected
Erlang OTP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Erlang/OTP是Erlang/OTP开源的一个JavaScript编写的处理处理异常的库。该库可以捕捉node.js内置API引发的异常。 Erlang/OTP erl_interface 5.5.2.1之前版本、5.7.0.1版本和5.8.1版本存在安全漏洞，该漏洞源于ei_printterm.c中ei_s_print_term函数使用固定2000字符栈缓冲区格式化项时，处理超大整数导致缓冲区溢出，限制为拒绝服务攻击。

CVSS 6.9 · Medium EPSS 0.14% · P3

Affected Version Matrix 4

VendorProduct Version RangeStatus
Erlang OTP 17.0< * affected
3.7.16< * affected
84adefa331c4159d432d22840663c38f155cd4c1< 0bef277b2d39dc8babb9ceb4f5d0a456f3007111 affected
0bef277b2d39dc8babb9ceb4f5d0a456f3007111< * unaffected
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I. Basic Information for CVE-2026-49760

Vulnerability Information
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Vulnerability Title
Stack Buffer Overflow in ei_s_print_term at Very Large Integer
Source: CVE Program / CVE List V5
Vulnerability Description
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 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. The companion function ei_print_term, which prints directly to a FILE instead of a memory buffer, does not contain this bug. This issue affects OTP from OTP 17.0 before OTP 27.3.4.13, OTP 28.5.0.2, and OTP 29.0.2, corresponding to erl_interface from 3.7.16 before 5.5.2.1, 5.7.0.1, and 5.8.1. Whether OTP before OTP 17.0, corresponding to erl_interface before 3.7.16, is affected is unknown.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Erlang/OTP 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Erlang/OTP是Erlang/OTP开源的一个JavaScript编写的处理处理异常的库。该库可以捕捉node.js内置API引发的异常。 Erlang/OTP erl_interface 5.5.2.1之前版本、5.7.0.1版本和5.8.1版本存在安全漏洞，该漏洞源于ei_printterm.c中ei_s_print_term函数使用固定2000字符栈缓冲区格式化项时，处理超大整数导致缓冲区溢出，限制为拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Erlang OTP 17.0 ~ * cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
Erlang OTP 3.7.16 ~ * cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*
Erlang OTP 84adefa331c4159d432d22840663c38f155cd4c1 ~ 0bef277b2d39dc8babb9ceb4f5d0a456f3007111 cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-49760

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III. Intelligence Information for CVE-2026-49760

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Patches & Fixes for CVE-2026-49760 (1)

Vendor Advisories for CVE-2026-49760 (3)

Same Patch Batch · Erlang · 2026-06-10 · 7 CVEs total

CVE-2026-49759 8.8 HIGH Stack buffer overflow in SCTP error cause parsing in inet_drv allows remote VM crash
CVE-2026-48860 7.5 HIGH Distribution-over-TLS LAN allowlist silently bypassed due to sockname/peername confusion i
CVE-2026-48856 7.1 HIGH httpc leaks Authorization header to cross-origin redirect targets
CVE-2026-48859 6.3 MEDIUM SSH server timing side-channel in ssh_auth:check_password/3 allows unauthenticated usernam
CVE-2026-48858 6.3 MEDIUM ftp client PASV response IP not validated against control peer, enabling SSRF and FTP boun
CVE-2026-48855 2.3 LOW SFTP READLINK Leaks Absolute Backend Filesystem Path When Root Is Configured

IV. Related Vulnerabilities

Same product: OTP
Same vendor: Erlang
Same weakness: CWE-121

V. Comments for CVE-2026-49760

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