False positive: GHSA-9w8r-397f-prfh (CVE-2021-20270), GHSA-pq64-v7f5-gqh8 (CVE-2021-27291), GHSA-mrwq-x4v8-fh7p (CVE-2022-40896) python3-Pygments in SLES 15.5

[sekveaja]

What happened:
Scan on image that has python3-Pygments-2.6.1-4.3.1.noarch installed.
It generates high vulnerability:

{
"vulnerability": {
"id": "GHSA-9w8r-397f-prfh",
"dataSource": "GHSA-9w8r-397f-prfh",
"namespace": "github:language:python",
"severity": "High",
"urls": [
"https://github.com/advisories/GHSA-9w8r-397f-prfh"
],

:
:
"relatedVulnerabilities": [
{
"id": "CVE-2021-20270",
"dataSource": "https://nvd.nist.gov/vuln/detail/CVE-2021-20270",
"namespace": "nvd:cpe",
"severity": "High",
"urls": [
"https://bugzilla.redhat.com/show_bug.cgi?id=1922136",
"https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html",
"https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html",
"https://www.debian.org/security/2021/dsa-4889",
"https://www.oracle.com/security-alerts/cpuoct2021.html"
],
"description": "An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the "exception" keyword.",

:
:

"artifact": {
"id": "bce8ec0e0a965ed7",
"name": "Pygments",
"version": "2.6.1",
"type": "python",
"locations": [
{
"path": "/usr/lib/python3.6/site-packages/Pygments-2.6.1-py3.6.egg-info/PKG-INFO",
"layerID": "sha256:4bfdb8762be5511b925a34075857d0a0ba0849de7f77ab71b52e15e482cc2b86"
},

"cvss": [

What you expected to happen:

According to SUSE Advisory:
https://www.suse.com/security/cve/CVE-2021-20270.html

SUSE Linux Enterprise Server 15 SP5
python3-Pygments >= 2.6.1-4.3.1
Patchnames:
SUSE Linux Enterprise Module for Basesystem 15 SP5 GA python3-Pygments-2.6.1-4.3.1

Installed version in the container:

rpm -qa | grep python

python3-Pygments-2.6.1-4.3.1.noarch

Conclusion: Installed version meet minimum requirement patch from SLES 15.5 but Grype generate a vulnerability.
Therefore, it is a false positive.

How to reproduce it (as minimally and precisely as possible):

1)Create the Dockerfile with this content:

FROM registry.suse.com/suse/sle15:15.5
RUN zypper in -y --no-recommends python3-Pygments=2.6.1-4.3.1
ENTRYPOINT [""]
CMD ["bash"]

2. Build an image from Dockerfile

docker build -t "suse15.5_test:v1" .
docker run -it suse15.5_test:v1 bash

e22c80017ab7:/ # rpm -qa | grep -i pygment
python3-Pygments-2.6.1-4.3.1.noarch

3. Test with Grype

$ grype --distro sles15.5 suse15.5_python-pygment:v1
NAME INSTALLED FIXED-IN TYPE VULNERABILITY SEVERITY
Pygments 2.6.1 2.7.4 python GHSA-pq64-v7f5-gqh8 High
Pygments 2.6.1 2.7.4 python GHSA-9w8r-397f-prfh High
Pygments 2.6.1 2.15.0 python GHSA-mrwq-x4v8-fh7p Medium

Anything else we need to know?:

Environment:
$ grype --version
grype 0.76.0

In container image eco-system:
bash-4.4$ cat /etc/release

NAME="SLES"
VERSION="15-SP5"
VERSION_ID="15.5"
PRETTY_NAME="SUSE Linux Enterprise Server 15 SP5"
ID="sles"
ID_LIKE="suse"
ANSI_COLOR="0;32"
CPE_NAME="cpe:/o:suse:sles:15:sp5"
DOCUMENTATION_URL="https://documentation.suse.com/"