Backstage is an open framework for building developer portals, and @backstage/plugin-techdocs-node provides common node.js functionalities for TechDocs. In versions of @backstage/plugin-techdocs-node prior to 1.13.11 and 1.14.1, when TechDocs is configured with runIn: local, a malicious actor who can submit or modify a repository's mkdocs.yml file can execute arbitrary Python code on the TechDocs build server via MkDocs hooks configuration. @backstage/plugin-techdocs-node versions 1.13.11 and 1.14.1 contain a fix. The fix introduces an allowlist of supported MkDocs configuration keys. Unsupported configuration keys (including hooks) are now removed from mkdocs.yml before running the generator, with a warning logged to indicate which keys were removed. Users of @techdocs/cli should also upgrade to the latest version, which includes the fixed @backstage/plugin-techdocs-node dependency. Some workarounds are available. Configure TechDocs with runIn: docker instead of runIn: local to provide container isolation, though it does not fully mitigate the risk. Limit who can modify mkdocs.yml files in repositories that TechDocs processes; only allow trusted contributors. Implement PR review requirements for changes to mkdocs.yml files to detect malicious hooks configurations before they are merged. Use MkDocs < 1.4.0 (e.g., 1.3.1) which does not support hooks. Note: This may limit access to newer MkDocs features. Building documentation in CI/CD pipelines using @techdocs/cli does not mitigate this vulnerability, as the CLI uses the same vulnerable @backstage/plugin-techdocs-node package.
CVE-2026-25153
“—” beside the score: it is equal to NVD's CVSS score.
This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.6% (49th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 7.7 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-02-02) is not newer than that change (2026-07-15), so it does not.
Also known asEUVD-2026-5004 (ENISA EUVD) · GHSA-6jr7-99pf-8vgf (GitHub Security Advisories)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 8.8
- EG Score
- 8.8HIGHmedium confidence
- EG Risk
- 40EG Risk 40/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity88% × 45%Impact severity (EG Severity): CVSS 8.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.6% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.6%
- EPSS %ILE
- 49th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (8.8): severity, escalated by confirmed exploitation. This CVE's 8.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 8.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 0.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (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
January 30, 2026
Last Modified
July 15, 2026
Advisory Details (6)
Auto-updated Jun 30, 20262435576 – (CVE-2026-25153) CVE-2026-25153 @backstage/plugin-techdocs-node: @backstage/plugin-techdocs-node vulnerable to arbitrary code execution via MkDocs hooks
https://bugzilla.redhat.com/show_bug.cgi?id=2435576cve-details
https://access.redhat.com/security/cve/CVE-2026-25153Arbitrary code execution via MkDocs hooks in TechDocs · Advisory · backstage/backstage · GitHub
https://github.com/backstage/backstage/security/advisories/GHSA-6jr7-99pf-8vgfVendor Advisories for CVE-2026-25153(2)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(4)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | rhdh/rhdh-hub-rhel9:1775140647 | 2026-04-07 | redhat |
| redhat | rhdh/rhdh-hub-rhel9:1774545605 | 2026-03-30 | redhat |
| npm | @backstage/plugin-techdocs-node @ 1.14.1 (fixes = 1.14.0) | — | ghsa |
| npm | @backstage/plugin-techdocs-node @ 1.13.11 (fixes < 1.13.11) | — | ghsa |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
npm(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| @backstage/plugin-techdocs-node | 1.14.0 |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 11× in last 7d / 45× 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.
Showing the most recent 99 of 224 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 125 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-11-01 07:57 UTCGHSA enrichmentGHSA-6jr7-99pf-8vgf · GitHub severity HIGH · GitHub CVSS 7.7
- 2026-11-01 07:57 UTCEG score recompute
- 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-30 23:29 UTCEG score recompute
- 2026-10-30 23:29 UTCVendor advisory
- 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-25 14:40 UTCEG score recompute
- 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-24 08:10 UTCEG score recompute
- 2026-10-24 08:10 UTCVendor advisory
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-18 03:53 UTCEG score recompute
- 2026-10-17 16:50 UTCEG score recompute
- 2026-10-17 16:50 UTCVendor advisory
Show 74 moreShow fewer
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-12 16:19 UTCEG score recompute
- 2026-10-11 20:01 UTCEG score recompute
- 2026-10-11 17:14 UTCEG score recompute
- 2026-10-11 14:46 UTCEG score recompute
- 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-09 12:25 UTCOSV refresh
- 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-24 14:03 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-19 19:33 UTCOSV refresh
- 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-31 23:04 UTCOSV refresh
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.6% · 44th percentile
- 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
- 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-08-15 00:10 UTCVendor advisory
- 2026-08-14 11:50 UTCEG score recompute
- 2026-08-14 11:50 UTCVendor advisory
- 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-08-13 03:57 UTCEG score recompute
- 2026-08-13 03:57 UTCVendor advisory
- 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-08-10 10:09 UTCVendor advisory
- 2026-08-09 16:20 UTCEG score recompute
- 2026-08-09 16:20 UTCVendor advisory
- 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-08-07 23:08 UTCEG score recompute
Related CVEs(same product + same vendor + same CWE)
Same product
9 shownnpm:@backstage/plugin-techdocs-node
Same vendor
10 shownredhat:RHSA-2026:6174
Frequently asked(5)
What is CVE-2026-25153?
When was the CVE record for CVE-2026-25153 published?
Is CVE-2026-25153 actively exploited?
What is the CVSS score of CVE-2026-25153?
How do I remediate CVE-2026-25153?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-25153
Is Your Infrastructure Affected by CVE-2026-25153?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.