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CVE-2026-71562: CWE-1284 Improper Validation of Specified Quantity in Input in Erlang OTP

0
Medium
VulnerabilityCVE-2026-71562cvecve-2026-71562cwe-1284
Published: 09/01/2026 (09/01/2026, 14:33:41 UTC)
Source: CVE Database V5
Vendor/Project: Erlang
Product: OTP

Description

Improper Validation of Specified Quantity in Input vulnerability in Erlang/OTP inets httpc allows a malicious or compromised HTTP server to degrade availability by returning a numeric header whose value is a very long run of digits. httpc_handler.erl converts the server-supplied Content-Length with list_to_integer/1 before comparing it against max_body_size, so the size check cannot protect the conversion, and the option defaults to nolimit in any case. The same unbounded conversion appears in httpc_response:format_response/1 for Content-Length and in httpc_response:get_ms_from_retry_after/1 for Retry-After, which is guarded only by a check that the first character is a digit. A value of up to roughly 1.26 million digits converts successfully and costs the requesting process hundreds of milliseconds of arbitrary-precision arithmetic per response. The conversion function is documented to accept integers of any size, so bounding the input is the caller's responsibility. This issue affects OTP from OTP 17.0 before OTP 27.3.4.17, from OTP 28.0 before OTP 28.5.0.6, and from OTP 29.0 before OTP 29.0.6, corresponding to inets from 5.10 before 9.3.2.7, from 9.4 before 9.6.2.3, and from 9.7 before 9.7.2. Whether OTP before OTP 17.0, corresponding to inets before 5.10, is affected is unknown.

CVSS v4.0

Score 6.3medium

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
None
Vuln. Integrity
None
Vuln. Availability
Low
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Affected software

GitHub Actionsmore threats →cve
inets
pkg:github/inets
Affected versions
>=5.10 <9.3.2.7>=9.4 <9.6.2.3>=9.7 <9.7.2
GitHub Actionsmore threats →cve
erlang/otp
pkg:github/erlang/otp
CPE configurations
cpe:2.3:a:erlang:erlang\/otp:*:*:*:*:*:*:*:*

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

Technical Details

Data Version
5.2
Assigner Short Name
EEF
Date Reserved
2026-08-07T15:15:01.474Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a96e6ecacd9273b49d71683

Added to database: 09/01/2026, 14:53:32 UTC

Last updated: 09/01/2026, 14:53:32 UTC

Views: 1

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