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fflate through 0.8.2 is vulnerable to denial of service via an infinite loop in unzipSync(). A crafted ZIP archive with a central directory entry declaring compressed_size=0xFFFFFFFF (ZIP64 sentinel) but missing the required ZIP64 extra fie…

Collected exploitation and prediction evidence

Risk source coverage

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-45820

Published

fflate through 0.8.2 is vulnerable to denial of service via an infinite loop in unzipSync(). A crafted ZIP archive with a central directory entry declaring compressed_size=0xFFFFFFFF (ZIP64 sentinel) but missing the required ZIP64 extra field tag 0x0001 causes z64e() to loop indefinitely due to out-of-bounds reads returning undefined, which coerces to 0, keeping the loop condition permanently true.

Source published
22 Jul 2026 06:57:13 UTC
Source modified
22 Jul 2026 12:53:38 UTC
Observed here
23 Oct 2026 15:48:27 UTC
Source terms
CVE Program Terms of Use

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 6.6 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:Y/R:U/V:D/RE:M/U:Amber

euvd · EUVD-2026-47616

Published

fflate through 0.8.2 is vulnerable to denial of service via an infinite loop in unzipSync(). A crafted ZIP archive with a central directory entry declaring compressed_size=0xFFFFFFFF (ZIP64 sentinel) but missing the required ZIP64 extra field tag 0x0001 causes z64e() to loop indefinitely due to out-of-bounds reads returning undefined, which coerces to 0, keeping the loop condition permanently true.

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Jul 22, 2026, 6:57:13 AM

dateUpdated: Jul 22, 2026, 12:53:38 PM

8 related source bulletins · separate from aliases

RHSA-2026:87004: Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update

CVE-2026-45820 · CVE-2026-87776 · CVE-2026-90711 · CVE-2026-90959 · CVE-2026-94416 · CVE-2026-102266 · CVE-2026-102267 · CVE-2026-102271 · CVE-2026-102272 · CVE-2026-102273

RHSA-2026:68695: Red Hat Security Advisory: Kiali 2.27.4 for Red Hat OpenShift Service Mesh 3.4

CVE-2026-33818 · CVE-2026-45820 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-75838 · CVE-2026-84375 · CVE-2026-92982

RHSA-2026:79378: Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.7 Container Release Update

CVE-2026-45820 · CVE-2026-59893 · CVE-2026-63374 · CVE-2026-69243 · CVE-2026-76218 · CVE-2026-76219 · CVE-2026-76220 · CVE-2026-76221 · CVE-2026-76222 · CVE-2026-78676 · CVE-2026-91990 · CVE-2026-96760 · CVE-2026-102273

WID-SEC-W-2026-3596: IBM App Connect Enterprise: Mehrere Schwachstellen

CVE-2022-35948 · CVE-2026-13149 · CVE-2026-14257 · CVE-2026-15157 · CVE-2026-1527 · CVE-2026-16728 · CVE-2026-16729 · CVE-2026-18149 · CVE-2026-18540 · CVE-2026-19534 · CVE-2026-2391 · CVE-2026-45820 · CVE-2026-54272 · CVE-2026-63670 · CVE-2026-67213 · CVE-2026-67214 · CVE-2026-69152 · CVE-2026-69192 · CVE-2026-69198 · CVE-2026-73566 · CVE-2026-73646 · CVE-2026-77037 · CVE-2026-77063 · CVE-2026-77078 · CVE-2026-82333 · CVE-2026-82417 · CVE-2026-82562 · CVE-2026-83605 · CVE-2026-83606 · CVE-2026-83607 · CVE-2026-83608 · CVE-2026-83609 · CVE-2026-83610 · CVE-2026-83611 · CVE-2026-83612 · CVE-2026-83613 · CVE-2026-83614 · CVE-2026-83615 · CVE-2026-83616 · CVE-2026-83618 · CVE-2026-83619 · CVE-2026-84292 · CVE-2026-84371 · CVE-2026-84375 · CVE-2026-84890 · CVE-2026-84933 · CVE-2026-84947 · CVE-2026-84961 · CVE-2026-85008 · CVE-2026-85014 · CVE-2026-85024 · CVE-2026-85152

RHSA-2026:92510: Red Hat Security Advisory: RHOAI 3.4.6 - Red Hat OpenShift AI

CVE-2023-54404 · CVE-2026-11822 · CVE-2026-11824 · CVE-2026-13717 · CVE-2026-16221 · CVE-2026-17106 · CVE-2026-18446 · CVE-2026-25681 · CVE-2026-26007 · CVE-2026-27136 · CVE-2026-33814 · CVE-2026-33818 · CVE-2026-39821 · CVE-2026-39834 · CVE-2026-41178 · CVE-2026-42502 · CVE-2026-45819 · CVE-2026-45820 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-57516 · CVE-2026-59951 · CVE-2026-63209 · CVE-2026-63374 · CVE-2026-65898 · CVE-2026-67312 · CVE-2026-67314 · CVE-2026-67320 · CVE-2026-67321 · CVE-2026-69097 · CVE-2026-69153 · CVE-2026-73086 · CVE-2026-73088 · CVE-2026-73089 · CVE-2026-73643 · CVE-2026-75838 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76172 · CVE-2026-76844 · CVE-2026-77301 · CVE-2026-78679 · CVE-2026-82397 · CVE-2026-83663 · CVE-2026-84375 · CVE-2026-84445 · CVE-2026-85393 · CVE-2026-85525 · CVE-2026-87018 · CVE-2026-90711 · CVE-2026-91990 · CVE-2026-92599 · CVE-2026-93690 · CVE-2026-93749 · CVE-2026-94637 · CVE-2026-96640 · CVE-2026-96643 · CVE-2026-96644 · CVE-2026-96778 · CVE-2026-96804 · CVE-2026-97687 · CVE-2026-97689 · CVE-2026-102267 · CVE-2026-102271 · CVE-2026-102272 · CVE-2026-102276 · CVE-2026-102278 · CVE-2026-102282 · CVE-2026-104150 · CVE-2026-104851 · CVE-2026-105922 · CVE-2026-106445 · CVE-2026-106446 · CVE-2026-109156 · CVE-2026-109383 · CVE-2026-109527 · CVE-2026-109829 · CVE-2026-109869 · CVE-2026-109956 · CVE-2026-110856 · CVE-2026-110857 · CVE-2026-110858 · CVE-2026-110859 · CVE-2026-111064 · CVE-2026-111066 · CVE-2026-111497 · CVE-2026-112390 · CVE-2026-112391 · CVE-2026-112392 · CVE-2026-112397 · CVE-2026-112399 · CVE-2026-112400 · CVE-2026-112402 · CVE-2026-112404 · CVE-2026-112405 · CVE-2026-112893 · CVE-2026-112894 · CVE-2026-112895 · CVE-2026-112896 · CVE-2026-112897 · CVE-2026-112940 · CVE-2026-114145

RHSA-2026:68690: Red Hat Security Advisory: Kiali 2.22.10 for Red Hat OpenShift Service Mesh 3.3

CVE-2026-33818 · CVE-2026-45820 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-75838 · CVE-2026-84375

RHSA-2026:87120: Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update

CVE-2026-27459 · CVE-2026-39836 · CVE-2026-45820 · CVE-2026-63374 · CVE-2026-69243 · CVE-2026-90959 · CVE-2026-92982 · CVE-2026-93599 · CVE-2026-96760 · CVE-2026-97687 · CVE-2026-97689 · CVE-2026-102266 · CVE-2026-102267 · CVE-2026-102268 · CVE-2026-102271 · CVE-2026-102272 · CVE-2026-102273 · CVE-2026-102925 · CVE-2026-102930 · CVE-2026-102937 · CVE-2026-102938 · CVE-2026-103262 · CVE-2026-104851

RHSA-2026:87410: Red Hat Security Advisory: RHOAI 2.25.12 - Red Hat OpenShift AI

CVE-2024-12224 · CVE-2025-14920 · CVE-2025-14921 · CVE-2025-14924 · CVE-2025-14925 · CVE-2025-14926 · CVE-2025-14927 · CVE-2025-14928 · CVE-2025-14929 · CVE-2025-14930 · CVE-2025-61726 · CVE-2025-61729 · CVE-2026-5241 · CVE-2026-5497 · CVE-2026-6734 · CVE-2026-8643 · CVE-2026-9697 · CVE-2026-11822 · CVE-2026-11824 · CVE-2026-12151 · CVE-2026-12860 · CVE-2026-15143 · CVE-2026-15574 · CVE-2026-15679 · CVE-2026-15925 · CVE-2026-16221 · CVE-2026-18427 · CVE-2026-18446 · CVE-2026-18949 · CVE-2026-19481 · CVE-2026-19484 · CVE-2026-19534 · CVE-2026-25681 · CVE-2026-25960 · CVE-2026-27136 · CVE-2026-28390 · CVE-2026-28684 · CVE-2026-31812 · CVE-2026-32283 · CVE-2026-33186 · CVE-2026-33805 · CVE-2026-33811 · CVE-2026-33814 · CVE-2026-34993 · CVE-2026-39821 · CVE-2026-39852 · CVE-2026-39892 · CVE-2026-40682 · CVE-2026-41178 · CVE-2026-42502 · CVE-2026-42561 · CVE-2026-44431 · CVE-2026-44432 · CVE-2026-44660 · CVE-2026-44705 · CVE-2026-45820 · CVE-2026-47219 · CVE-2026-48526 · CVE-2026-48710 · CVE-2026-48746 · CVE-2026-49114 · CVE-2026-49825 · CVE-2026-49855 · CVE-2026-50559 · CVE-2026-54283 · CVE-2026-54399 · CVE-2026-54428 · CVE-2026-55831 · CVE-2026-55833 · CVE-2026-56121 · CVE-2026-56746 · CVE-2026-56819 · CVE-2026-56853 · CVE-2026-56858 · CVE-2026-56859 · CVE-2026-56860 · CVE-2026-56862 · CVE-2026-58059 · CVE-2026-59296 · CVE-2026-59879 · CVE-2026-59884 · CVE-2026-59885 · CVE-2026-59886 · CVE-2026-59899 · CVE-2026-62243 · CVE-2026-62384 · CVE-2026-63209 · CVE-2026-63374 · CVE-2026-65898 · CVE-2026-65918 · CVE-2026-66007 · CVE-2026-67213 · CVE-2026-67214 · CVE-2026-67312 · CVE-2026-68494 · CVE-2026-68497 · CVE-2026-68770 · CVE-2026-69097 · CVE-2026-69112 · CVE-2026-69152 · CVE-2026-69153 · CVE-2026-69243 · CVE-2026-69244 · CVE-2026-71281 · CVE-2026-73086 · CVE-2026-73088 · CVE-2026-73089 · CVE-2026-73415 · CVE-2026-73417 · CVE-2026-73502 · CVE-2026-73508 · CVE-2026-73620 · CVE-2026-73622 · CVE-2026-73623 · CVE-2026-73624 · CVE-2026-73625 · CVE-2026-73627 · CVE-2026-73646 · CVE-2026-75838 · CVE-2026-75899 · CVE-2026-75931 · CVE-2026-75975 · CVE-2026-76098 · CVE-2026-76169 · CVE-2026-76172 · CVE-2026-76222 · CVE-2026-76905 · CVE-2026-77354 · CVE-2026-77874 · CVE-2026-78676 · CVE-2026-78677 · CVE-2026-78679 · CVE-2026-78682 · CVE-2026-79674 · CVE-2026-79675 · CVE-2026-80205 · CVE-2026-81722 · CVE-2026-81724 · CVE-2026-81727 · CVE-2026-82397 · CVE-2026-82417 · CVE-2026-84292 · CVE-2026-84375 · CVE-2026-84394 · CVE-2026-84428 · CVE-2026-84445 · CVE-2026-84469 · CVE-2026-84504 · CVE-2026-84782 · CVE-2026-84961 · CVE-2026-85124 · CVE-2026-85152 · CVE-2026-85525 · CVE-2026-86049 · CVE-2026-86332 · CVE-2026-87776 · CVE-2026-87817 · CVE-2026-87819 · CVE-2026-88029 · CVE-2026-88031 · CVE-2026-89418 · CVE-2026-89425 · CVE-2026-91777 · CVE-2026-91990 · CVE-2026-92599 · CVE-2026-93599 · CVE-2026-93657 · CVE-2026-93749 · CVE-2026-96749 · CVE-2026-102831 · CVE-2026-102925 · CVE-2026-102930 · CVE-2026-102937 · CVE-2026-102938 · CVE-2026-103262 · CVE-2026-104851 · CVE-2026-105744

Source published
Jul 22, 2026, 6:57:13 AM (timezone not stated)
Source modified
Jul 22, 2026, 12:53:38 PM (timezone not stated)
Observed here
7 Nov 2026 10:36:40 UTC
Source terms
ENISA EUVD · source terms and attribution apply

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.

EUVD CVSS 4.0 · 6.6 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:Y/R:U/V:D/RE:M/U:Amber

nvd · CVE-2026-45820

Published

fflate through 0.8.2 is vulnerable to denial of service via an infinite loop in unzipSync(). A crafted ZIP archive with a central directory entry declaring compressed_size=0xFFFFFFFF (ZIP64 sentinel) but missing the required ZIP64 extra field tag 0x0001 causes z64e() to loop indefinitely due to out-of-bounds reads returning undefined, which coerces to 0, keeping the loop condition permanently true.

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Analyzed

Weakness classifications: CWE-400 · CWE-835

Original publisher date fields

published: 2026-07-22T08:16:23.280

lastModified: 2026-10-24T17:10:00.220

1 source CPE criteria · context only
  • cpe:2.3:a:101arrowz:fflate:*:*:*:*:*:node.js:*:*

The original JSON retains the logical configuration operators, exclusions and version bounds.

Source published
22 Jul 2026 08:16:23 UTC
Source modified
24 Oct 2026 17:10:00 UTC
Observed here
25 Oct 2026 12:17:14 UTC
Source terms
NIST NVD usage terms; underlying source attribution retained

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 22e2d327-25fe-45d7-9f0c-dcd23b7108df · Secondary · 6.6 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:Y/R:U/V:D/RE:M/U:Amber

CVSS 3.1 · [email protected] · Primary · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

osv · GHSA-px8p-9vwx-vf98

Published

fflate through 0.8.2 is vulnerable to denial of service via an infinite loop in unzipSync(). A crafted ZIP archive with a central directory entry declaring compressed_size=0xFFFFFFFF (ZIP64 sentinel) but missing the required ZIP64 extra field tag 0x0001 causes z64e() to loop indefinitely due to out-of-bounds reads returning undefined, which coerces to 0, keeping the loop condition permanently true.

Source published
22 Jul 2026 09:32:13 UTC
Source modified
10 Sep 2026 03:50:52 UTC
Observed here
24 Oct 2026 13:17:17 UTC
Source terms
GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/S:N/AU:Y/R:U/V:D/RE:M/U:Amber

Publisher rating · MODERATE

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 7 Nov 21:58 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current