Detections
Analytics
SCA: security update for asteval (GHSA-89v8-rhwq-hf77)
medium Tenable Cloud Security Plugin ID 446175
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- ASTEVAL is an evaluator of Python expressions and statements. Prior to 1.0.9, FROM_PY in
asteval/astutils.py exposes BaseException, SystemExit, KeyboardInterrupt, and GeneratorExit to expressions
evaluated by asteval.Interpreter.eval(), while run() and eval() in asteval/asteval.py catch Exception
rather than these non-Exception BaseException subclasses. When an attacker-controlled expression raises
one of these classes, on_raise() passes the class to raise_exception(), and the resulting exception
bypasses the interpreter's safety handlers and propagates into the calling application. A consuming
service that evaluates untrusted expressions can therefore be terminated or have signal and cleanup
handling disrupted, causing denial of service. The separately documented read-only open() capability is
not part of this vulnerability. This issue is fixed in version 1.0.9. (CVE-2026-55244)
Solution
Update the asteval library and its related packages to version 1.0.9 or later.See Also
Plugin Details
Severity: Medium
ID: 446175
Version: Revision 1.2
Type: Local
Family: SCA Checks
Published: 8/20/2026
Updated: 9/15/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.66
Vendor
Vendor Severity: Medium
CVSS v2
Risk Factor: Medium
Base Score: 4.6
Temporal Score: 3.4
Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C
CVSS Score Source: CVE-2026-55244
CVSS v3
Risk Factor: Medium
Base Score: 5
Temporal Score: 4.4
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 8/20/2026
Vulnerability Publication Date: 8/20/2026
Reference Information
CVE: CVE-2026-55244
cwe: CWE-248