erlang-jose vulnerable to denial of service via large p2c value

published 2024-03-19 2 y ago modified 2026-06-17 4 mo ago also GHSA-9mg4-v392-8j68 , EUVD-2024-0885

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.9%; EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits: 0; none known

erlang-jose (aka JOSE for Erlang and Elixir) through 1.11.6 allow attackers to cause a denial of service (CPU consumption) via a large p2c (aka PBES2 Count) value in a JOSE header.

Patch / fix

fixed in 2 distros 2 links 1

hex jose 1.11.7
potatosalad erlang-jose 1.11.6

debian azure linux

erlang-jose Debian 14, Debian 13 1.11.10-1

debian advisories DEBIAN-CVE-2023-50966

rabbitmq-server Azure Linux 3.0 3.13.7-1
rabbitmq-server CBL-Mariner 2.0 3.11.24-2

azure linux advisories AZL-39719 AZL-39857

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

github.com/potatosalad/erlang-jose@718d213 commit

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-50966 updated 2026-01-13 cvss 6.5

erlang-jose: Denial-of-service due to high CPU consumption

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-03-20)

Exploit prediction

0.89% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
GitHub	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem	package	affected	fixed in
hex	jose	<1.11.7	1.11.7

Affected products

potatosalad erlang-jose

Classification

Weakness

CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary