buildebooks before 0.2.2 contains an OS command injection vulnerability in lib/kindle.js that allows attackers to execute commands by supplying a crafted EPUB file name passed to kindlegen via child_process.exec. Attackers can craft a book project with a malicious front-matter filename or project folder name and kindle: true to execute OS commands as the user running buildebooks.
CVE-2026-110637
HIGHPre-NVD 7.87.8Trending — 4 sources updated this week
EchelonGraph scoreHIGH confidence
“—” beside the score: it is equal to the CVSS score beside it.
Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-10-14. A secondary CVSS source baseline 7.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: GitHub Security Advisory, a secondary CVSS source
7.8EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 7.8Exploit: None knownExposed services: Not assessed
An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.
- CVSS v3
- 7.8
- EG Score
- 7.8HIGHhigh confidence
- EG Risk
- 35EG Risk 35/100
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computed (value × EchelonGraph’s weight)Severity78% × 45%The EG Score, 7.8 of 10.Exploitation0% × 40%No KEV listing, EG-KEV tier or EPSS when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release. - EPSS PROB
- 1.1%
- EPSS %ILE
- 66th
- KEV
- Not listed
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
October 14, 2026
Last Modified
October 15, 2026
Advisory Details (4)
Auto-updated Oct 14, 2026Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
Web page
buildebooks before 0.2.2 OS Command Injection via kindlegen EPUB File Name | Advisories | VulnCheck
https://www.vulncheck.com/advisories/buildebooks-before-0.2.2-os-command-injection-via-kindlegen-epub-file-nameWeb page
GitHub - wastemobile/buildebooks: Build ebooks using Pandoc and Kinglegen · GitHub
https://github.com/wastemobile/buildebooksGitHub commit
commit 123776c9ef61 (wastemobile/buildebooks)
Fix landed in wastemobile/buildebooks commit 123776c9ef61 — awaiting tagged release
https://github.com/wastemobile/buildebooks/commit/123776c9ef61e8075ada2f7da2f7046f6a8078d9GitHub pull request
fix(security): command injection in buildebooks (CWE-78)
Fix merged in wastemobile/buildebooks PR #12 on 2026-10-13 — awaiting tagged release
https://github.com/wastemobile/buildebooks/pull/12Vendor Advisories for CVE-2026-110637(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 9× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
- 2026-10-15 16:31 UTCEPSS rescoreEPSS 1.1% · 66th percentile
- 2026-10-15 15:06 UTCGHSA enrichmentGHSA-xq9r-4xcp-j7fm · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-14 19:32 UTCEG score recompute
- 2026-10-14 19:32 UTCGHSA enrichmentGHSA-xq9r-4xcp-j7fm · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-14 18:38 UTCEG score recompute
- 2026-10-14 18:37 UTCGHSA enrichmentGHSA-xq9r-4xcp-j7fm · GitHub severity HIGH · GitHub CVSS 7.8
- 2026-10-14 15:30 UTCEG score recompute
- 2026-10-14 14:32 UTCEG score recomputeFirst assessed: 7.8 HIGH
- 2026-10-14 14:29 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-78
Frequently asked(5)
What is CVE-2026-110637?
CVE-2026-110637 is a high-severity vulnerability; its CVE record was published on October 14, 2026. buildebooks before 0.2.2 contains an OS command injection vulnerability in lib/kindle.js that allows attackers to execute commands by supplying a crafted EPUB file name passed to kindlegen via child_process.exec. Attackers can craft a book project with a malicious front-matter filename or project…
When was CVE-2026-110637 made public?
CVE-2026-110637 was made public on September 1, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on October 14, 2026. EchelonGraph's copy of the record carries a last-modified date of October 15, 2026; the record at its source may have been updated since.
Is CVE-2026-110637 actively exploited?
CVE-2026-110637 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.1% probability of exploitation in the next 30 days (66th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-110637?
CVE-2026-110637 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-110637?
An upstream fix for CVE-2026-110637 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-110637 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-110637
Is Your Infrastructure Affected by CVE-2026-110637?
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