CVE-2016-9123

go-jose before 1.0.5 suffers from a CBC-HMAC integer overflow on 32-bit architectures. An integer overflow could lead to authentication bypass for CBC-HMAC encrypted ciphertexts on 32-bit architectures.

Published: 2017-03-28 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-9123 is rated Moderate Risk (47.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.27%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2016-9123

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-04 0.23% 0.27% +0.04%
2 2026-03-01 0.27% 0.23% -0.04%
3 2026-02-04 — 0.27% —

Full EPSS history (31 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-9123

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2016-9123

GitHub Security Advisory for CVE-2016-9123

OS Trackers for CVE-2016-9123

vendor priority summary link
debian not yet assigned CVE-2016-9123 not yet assigned priority: Debian including 1 source packages (golang-gopkg-square-go-jose.v1), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2016-9123
ubuntu medium CVE-2016-9123 medium priority: Ubuntu including 1 source packages (golang-gopkg-square-go-jose.v1), 6 status rows across 6 suites (precise, trusty, upstream, xenial, yakkety, zesty): DNE 3, ignored 1, not-affected 1, released 1. https://ubuntu.com/security/CVE-2016-9123

Affected software / configurations for CVE-2016-9123

Vendor Product Version Raw CPE
go-jose_project go-jose <= 1.0.4 cpe:2.3:a:go-jose_project:go-jose:*:*:*:*:*:*:*:*

References for CVE-2016-9123

URL Tags
http://www.openwall.com/lists/oss-security/2016/11/03/1 Mailing List Patch Third Party Advisory
https://github.com/square/go-jose/commit/789a4c4bd4c118f7564954f441b29c153ccd6a96 Issue Tracking Patch Third Party Advisory
https://hackerone.com/reports/165170 Permissions Required
cvelogic Threat Intelligence