CVE-2022-48566

Exp

An issue was discovered in compare_digest in Lib/hmac.py in Python through 3.9.1. Constant-time-defeating optimisations were possible in the accumulator variable in hmac.compare_digest.

Published: 2023-08-22 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-48566 is rated High Exploit Risk (61.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.15%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.09% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

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

Public exploit references (Exploit-DB) for CVE-2022-48566

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2022-48566

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 2026-06-15 0.06% 1.15% +1.09%
2 2025-11-21 0.50% 0.06% -0.44%
3 2025-11-18 — 0.50% —

Full EPSS history (13 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-48566

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.1 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/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:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
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:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 3.6 [email protected]

Weakness enumeration for CVE-2022-48566

OS Trackers for CVE-2022-48566

vendor priority summary link
debian not yet assigned CVE-2022-48566 not yet assigned priority: Debian including 3 source packages (pypy3, python2.7, python3.9), 7 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 7. https://security-tracker.debian.org/tracker/CVE-2022-48566
redhat medium — https://access.redhat.com/security/cve/CVE-2022-48566
suse medium CVE-2022-48566 severity moderate: SUSE including 433 source package names (0.0.17-1.1:libpython3_6m1_0-3.6.15-150300.10.57.1, 0.0.17-1.1:python3-3.6.15-150300.10.57.1, …), 1875 product×package rows across 372 product lines (Container bci/bci-base-fips, Container bci/bci-sle15-kernel-module-devel, … (372 product lines)): Fixed 1510, Known Affected 231, Known Not Affected 134. https://www.suse.com/security/cve/CVE-2022-48566/
ubuntu medium CVE-2022-48566 medium priority: Ubuntu including 11 source packages (python, python2.7, …), 132 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 98, released 13, not-affected 11, needs-triage 6, ignored 3, needed 1. https://ubuntu.com/security/CVE-2022-48566

Affected software / configurations for CVE-2022-48566

Vendor Product Version Raw CPE
python python < 3.6.13 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
python python >= 3.7.0, < 3.7.10 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
python python >= 3.8.0, < 3.8.7 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
python python >= 3.9.0, < 3.9.1 cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
netapp active_iq_unified_manager — cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
netapp active_iq_unified_manager — cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*
netapp converged_systems_advisor_agent — cpe:2.3:a:netapp:converged_systems_advisor_agent:-:*:*:*:*:*:*:*

References for CVE-2022-48566

URL Tags
https://bugs.python.org/issue40791 Exploit Issue Tracking Patch Vendor Advisory
https://lists.debian.org/debian-lts-announce/2023/09/msg00022.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2023/10/msg00017.html Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20231006-0013/ Third Party Advisory
cvelogic Threat Intelligence