RHLW-2026-8c3fe2e9e5dcb600

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Source
https://github.com/project-lightwell/lightwell-osv/blob/main/advisories/RHLW-2026-8c3fe2e9e5dcb600.json
Import Source
https://github.com/project-lightwell/lightwell-osv/blob/main/advisories/RHLW-2026-8c3fe2e9e5dcb600.json
JSON Data
https://api.osv.dev/v1/vulns/RHLW-2026-8c3fe2e9e5dcb600
Upstream
CVE (3)
GHSA (3)
Published
2026-11-06T16:40:15Z
Modified
2026-11-06T19:43:10Z
Severity
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Lightwell Security Advisory: pypdf 6.21.1+rhlw.1
Details

Red Hat Lightwell has released pypdf 6.21.1+rhlw.1 with backported fixes for CVE-2026-115585, CVE-2026-115572, and CVE-2026-115580.

CVE-2026-115585: pypdf: Possible long runtimes for repeated malformed cross-reference entries (Follow-up)

CVE-2026-115572: pypdf: Possible long runtimes for repeated references to the same missing object

CVE-2026-115580: pypdf: Possible long runtimes for large xref table header limits

This patched artifact is a drop-in replacement for pypdf 6.21.1 from PyPI.

References
Credits
    • Red Hat Lightwell - REMEDIATION_DEVELOPER

Affected packages

Red Hat Lightwell:PyPI / pypdf

Package

Name
pypdf
Purl
pkg:pypi/pypdf

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
6.21.1+rhlw.1

Affected versions

1.*
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10
1.11
1.12
1.13
3.*
3.1.0
3.2.0
3.2.1
3.3.0
3.4.0
3.4.1
3.5.0
3.5.1
3.5.2
3.6.0
3.7.0
3.7.1
3.8.0
3.8.1
3.9.0
3.9.1
3.10.0
3.11.0
3.11.1
3.12.0
3.12.1
3.12.2
3.13.0
3.14.0
3.15.0
3.15.1
3.15.2
3.15.3
3.15.4
3.15.5
3.16.0
3.16.1
3.16.2
3.16.3
3.16.4
3.17.0
3.17.1
3.17.2
3.17.3
3.17.4
4.*
4.0.0
4.0.1
4.0.2
4.1.0
4.2.0
4.3.0
4.3.1
5.*
5.0.0
5.0.1
5.1.0
5.2.0
5.3.0
5.3.1
5.4.0
5.5.0
5.6.0
5.6.1
5.7.0
5.8.0
5.9.0
6.*
6.0.0
6.1.0
6.1.1
6.1.2
6.1.3
6.2.0
6.3.0
6.4.0
6.4.1
6.4.2
6.5.0
6.6.0
6.6.1
6.6.2
6.7.0
6.7.1
6.7.2
6.7.3
6.7.4
6.7.5
6.8.0
6.9.0
6.9.1
6.9.2
6.10.0
6.10.1
6.10.2
6.11.0
6.12.0
6.12.1
6.12.2
6.13.0
6.13.1
6.13.2
6.13.3
6.14.0
6.14.1
6.14.2
6.15.0
6.16.0
6.16.1
6.16.2
6.17.0
6.18.0
6.18.1
6.19.0
6.20.0
6.20.1
6.21.0
6.21.1

Database specific

lightwell 
{
    "backport_base_version": "6.21.1",
    "remediated_version": "6.21.1+rhlw.1",
    "repository_url": "https://packages.redhat.com/lightwell/python/remediated/"
}
source 
"https://github.com/project-lightwell/lightwell-osv/blob/main/advisories/RHLW-2026-8c3fe2e9e5dcb600.json"