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Response snapshot Oct 27, 2026, 00:05 UTC

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VulnerabilityCVE-2026-112955

ApostropheCMS: Import archives can exhaust server storage and deny service

Package: @apostrophecms/import-export, version 3.7.0. Release tag reviewed: @apostrophecms/import-export@3.7.0, commit 9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce (September 30, 2026).

At a glance

Exploited
Not known
Severity
6.5 Medium (CVSS 3.1)
Chance of exploitation
0.5% in the next 30 days
Sources
1 source

What to do

GitHub lists first patched versions: @apostrophecms/import-export: 3.7.1. Confirm the affected range and upgrade guidance in the exact advisory.

Read GitHub-reviewed advisory GHSA-9g7p-m758-rp72 (opens a new tab)

What happened

## Review scope and evidence limits

Package: @apostrophecms/import-export, version 3.7.0.

Release tag reviewed: @apostrophecms/import-export@3.7.0, commit 9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce (September 30, 2026).

Current main reviewed: 5ce3732be0ebdebb4db0f8ef160c81e8671157e6.

Continue reading

The importer, gzip extractor, import permission gate, and core permission implementation have no differences between that release tag and the reviewed main. This follow-up is a static remediation review. We have not repeated the original end-to-end reproductions against the latest release or tested a deployed site.

Current exploitability and impact therefore still require maintainer validation; the observations below establish that the reported security checks remain absent in public source. The original emailed PDF contains the original reproduction material. Please refer to that existing private attachment.

## Import archive extraction lacks resource quotas and failure cleanup

The current gzip extractor handles destination write errors and waits for write completion; those parts of the original report should no longer be treated as unchanged. The import routes also now require a logged-in user before big-upload processing, as covered by GHSA-86wm-68pq-5jwq.

However, extract() still writes expanded archive entries without per-entry, aggregate decompressed-byte, or entry-count quotas. Archive parsing still precedes document-type authorization. If extraction or parsing fails, import() notifies and rethrows before the later storage.remove() call, with no unconditional cleanup around that lifecycle.

The reported residual risk is excessive storage consumption and retained extraction/staging artifacts from authenticated imports. Handling a write error and requiring login do not enforce a storage budget.

Suggested remediation: add configurable streaming quotas based on actual decompressed bytes, cap entries and allowed entry types, bound concurrent imports, and clean local and uploadfs artifacts on every failure. Retain continuation artifacts only under explicit ownership, expiry and total-storage limits.

Source references: - [Gzip extractor](https://github.com/apostrophecms/apostrophe/blob/5ce3732be0ebdebb4db0f8ef160c81e8671157e6/packages/import-export/lib/formats/gzip.js) - [Import lifecycle and cleanup](https://github.com/apostrophecms/apostrophe/blob/5ce3732be0ebdebb4db0f8ef160c81e8671157e6/packages/import-export/lib/methods/import.js) - [Related authentication fix](https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-86wm-68pq-5jwq)

## Coordination

Vivek R / Winfunc Original reporting team: Mufeed VH / Winfunc

Affected package ranges reported by GitHub: @apostrophecms/import-export: < 3.7.1

Scores and how they were measured

CVSS base severity

6.5

Version 3.1As of

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

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

0.5%

Scored Percentile 44.3%

Model and measurement source (opens a new tab)

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    GitHub-reviewed advisory GHSA-9g7p-m758-rp72 (opens a new tab)

    The public advisory supplies the description, affected package/version ranges, and any listed CVSS metric. GitHub review is not local review.

    Published Checked

  2. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-9g7p-m758-rp72, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  3. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-9g7p-m758-rp72, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  4. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-9g7p-m758-rp72, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  5. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-9g7p-m758-rp72, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  6. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-9g7p-m758-rp72, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  7. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-9g7p-m758-rp72, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  8. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-9g7p-m758-rp72, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  9. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-9g7p-m758-rp72, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  10. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-9g7p-m758-rp72, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  11. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-9g7p-m758-rp72, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

  12. Primary source

    FIRST measured EPSS score (opens a new tab)

    Measured EPSS probability and percentile for CVE-2026-112955, scored 2026-10-26. This is a model estimate, not proof of exposure.

    Published Checked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 21). ApostropheCMS: Import archives can exhaust server storage and deny service (CVE-2026-112955). https://kevwire.com/record/CVE-2026-112955

MLA

"ApostropheCMS: Import archives can exhaust server storage and deny service (CVE-2026-112955)." KEVWire, 21 Oct. 2026, kevwire.com/record/CVE-2026-112955.

Chicago

KEVWire. "ApostropheCMS: Import archives can exhaust server storage and deny service (CVE-2026-112955)." Last modified October 21, 2026. https://kevwire.com/record/CVE-2026-112955.

Evidence summary (plain text)

ApostropheCMS: Import archives can exhaust server storage and deny service (Oct 21, 2026).
Package: @apostrophecms/import-export, version 3.7.0.

Release tag reviewed: @apostrophecms/import-export@3.7.0, commit 9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce (September 30, 2026).
CVSS 6.5 (version 3.1; evidence as of Oct 21, 2026; https://github.com/advisories/GHSA-9g7p-m758-rp72).
EPSS 0.5% for the following 30 days, scored Oct 26, 2026 (https://api.first.org/data/v1/epss?cve=CVE-2026-112955&date=2026-10-26).
Sources:
GitHub-reviewed advisory GHSA-9g7p-m758-rp72: https://github.com/advisories/GHSA-9g7p-m758-rp72
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc&after=Y3Vyc29yOnYyOpK0MjAyNi0xMC0yMlQxNTo1Mjo1NlrOAAfxiA%3D%3D
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc&after=Y3Vyc29yOnYyOpK0MjAyNi0xMC0yMlQxNDowNjoxNFrOAAfxZw%3D%3D
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc&after=Y3Vyc29yOnYyOpK0MjAyNi0xMC0yMlQwODoyNzoyM1rOAAYp9A%3D%3D
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc&after=Y3Vyc29yOnYyOpK0MjAyNi0xMC0yMVQyMTozNTo1OFrOAAfwCQ%3D%3D
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc&after=Y3Vyc29yOnYyOpK0MjAyNi0xMC0yMVQyMTozMDoxM1rOAAfv2A%3D%3D
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc&after=Y3Vyc29yOnYyOpK0MjAyNi0xMC0yMVQyMToyODowOVrOAAfv1g%3D%3D
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc&after=Y3Vyc29yOnYyOpK0MjAyNi0xMC0yMVQyMToyNDoyMFrOAAfv1Q%3D%3D
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc&after=Y3Vyc29yOnYyOpK0MjAyNi0xMC0yMVQyMDo0NTowN1rOAAfvzQ%3D%3D
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc&after=Y3Vyc29yOnYyOpK0MjAyNi0xMC0yMVQyMDozMDoyNlrOAAfvxw%3D%3D
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc&after=Y3Vyc29yOnYyOpK0MjAyNi0xMC0yMVQyMDowMzo1N1rOAAfvxQ%3D%3D
FIRST measured EPSS score: https://api.first.org/data/v1/epss?cve=CVE-2026-112955&date=2026-10-26
Record ID: CVE-2026-112955.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Oct 26, 2026, 19:40 UTC. Ingestion is not an independent editorial investigation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

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