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Fencer Intel
medium 5.3

CVE-2026-31988 json

yauzl 3.2.0 - Denial of Service via Off-by-One Error in NTFS Timestamp Parser

published 7mo ago modified last mo. also GHSA-gmq8-994r-jv83 , EUVD-2026-11482

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits
0
none known

Summary

yauzl (aka Yet Another Unzip Library) version 3.2.0 for Node.js contains an off-by-one error in the NTFS extended timestamp extra field parser within the getLastModDate() function. The while loop condition checks cursor < data.length + 4 instead of cursor + 4 <= data.length, allowing readUInt16LE() to read past the buffer boundary. A remote attacker can cause a denial of service (process crash via ERR_OUT_OF_RANGE exception) by sending a crafted zip file with a malformed NTFS extra field. This affects any Node.js application that processes zip file uploads and calls entry.getLastModDate() on parsed entries. Fixed in version 3.2.1.

Patch / fix

  • npm yauzl 3.2.1
  • thejoshwolfe yauzl 3.2.1

Is CVE-2026-31988 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-31988 updated cvss 5.3

yauzl: yauzl: Denial of Service vulnerability in zip file processing

  • Red Hat Cryostat 4 cryostat-openshift-console-plugin-npm Red Hat Node HealthCheck Operator workload-availability/node-remediation-console-rhel8 Red Hat Build of Podman Desktop rh-podman-desktop.git Red Hat Developer Hub 1 rhdh/backstage-community-plugin-catalog-backend-module-scaffolder-relation-processor Red Hat Enterprise Linux 8 grafana, grafana-loki, grafana-mssql, grafana-mysql, grafana-selinux, grafana-graphite, +8 more
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 9 rust, cargo, clippy, grafana, rustfmt, rust-gdb, +10 more
    affected: workaround, no fix available, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 10 rust Red Hat Fuse 7 yauzl Red Hat JBoss Enterprise Application Platform Expansion Pack yauzl Red Hat OpenShift AI (RHOAI) rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9 Red Hat Openshift Data Foundation 4 odf4/mcg-core-rhel8, odf4/mcg-core-rhel9 Red Hat OpenShift Dev Spaces devspaces/code-rhel9
    +2 more products
    Red Hat Trusted Profile Analyzer rhtpa/rhtpa-trustification-service-rhel9 Red Hat Self-service automation portal 2 ansible-automation-platform/automation-portal
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Developer Hub 1.10 rhdh/rhdh-hub-rhel9 1780930740
    fixed: vendor fix RHSA-2026:24841
  • Red Hat Developer Hub 1.10 rhdh/rhdh-rhel9-operator 1779927546, rhdh/rhdh-operator-bundle 1780961472
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
partial
Assessed
7mo ago

Exploit prediction

0.57% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • codeant.ai https://www.codeant.ai/security-research/yauzl-denial-of-service-zip-file-crash referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 4.0 6.9 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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:X/AU:X/R:X/V:X/RE:X/U:X
GitHub 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected packages

ecosystem package affected fixed in
npm yauzl
>=3.2.0, <3.2.1
3.2.1

Affected products

  • thejoshwolfe yauzl

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.