CVE-2026-75432

MEDIUMPre-NVD 5.15.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 5.1 from GitHub Security Advisory published 2026-09-22. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory

Also known asEUVD-2026-84854 (ENISA EUVD) · GHSA-8gfp-q62c-5p3c (GitHub Security Advisories)Source: ENISA EUVD

5.1EG
EchelonGraph verdictMonitorThe upstream fix is not in a release yet: until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.1Exploit: 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.

An issue in yaml-cpp 0.9.0 allows a remote attacker to obtain sensitive information via the src/scanner.cpp, Scanner::PopIndent(), and Scanner::PushIndentTo() components

CVSS v3
5.1
EG Score
5.1MEDIUMmedium confidence
EG Risk
23
EG Risk 23/100

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)
Severity51% × 45%
Impact severity (EG Severity): CVSS 5.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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: An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it.
EPSS PROB
0.2%
EPSS %ILE
6th
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 (5.1): severity, escalated by confirmed exploitation. This CVE's 5.1 is its impact severity (EG Severity), not escalated.

EG Severity
5.1 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). 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.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.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.

An upstream fix is merged but not yet in a tagged release. Until the release ships, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule, then apply it.

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.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

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

September 22, 2026

Last Modified

October 3, 2026

Advisory Details (2)

Auto-updated Oct 3, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr.
Web page

[Bug]Scanner indent-stack underflow: PopIndent/PushIndentTo dereference *m_indents.top() on an empty stack (wild read, deterministic crash / remote DoS) (CWE-822) · Issue #1475 · jbeder/yaml-cpp · GitHub

https://github.com/jbeder/yaml-cpp/issues/1475
GitHub pull request

fix: fix stack underflow of PopIndent

Fix merged in jbeder/yaml-cpp PR #1476 on 2026-08-10 — awaiting tagged release

https://github.com/jbeder/yaml-cpp/pull/1476

Vendor Advisories for CVE-2026-75432(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
yaml-cpp0.7.0+dfsg-8 ... 0.9.0+dfsg-9 (19 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
yaml-cpp0.8.0+dfsg-7 ... 0.9.0+dfsg-9 (12 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
yaml-cpp0.8.0+dfsg-7 ... 0.9.0+dfsg-9 (12 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 57× 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.

  1. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  6. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  7. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  8. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  9. 2026-10-25 14:03 UTCEG score recompute
  10. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  11. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-10-22 21:33 UTCEG score recompute
  13. 2026-10-22 21:33 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c · GitHub CVSS 5.1
  14. 2026-10-22 18:57 UTCEG score recompute
  15. 2026-10-22 18:57 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c · GitHub CVSS 5.1
  16. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  17. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  19. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  20. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-10-18 03:13 UTCEG score recompute
  22. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  23. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  24. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  25. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
Show 49 more
  1. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-10-12 15:39 UTCEG score recompute
  3. 2026-10-11 19:25 UTCEG score recompute
  4. 2026-10-11 16:40 UTCEG score recompute
  5. 2026-10-11 13:59 UTCEG score recompute
  6. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  7. 2026-10-11 09:02 UTCEG score recompute
  8. 2026-10-11 09:01 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c · GitHub CVSS 5.1
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  10. 2026-10-10 06:40 UTCEG score recompute
  11. 2026-10-10 06:40 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c · GitHub CVSS 5.1
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  13. 2026-10-09 04:20 UTCEG score recompute
  14. 2026-10-09 04:20 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c · GitHub CVSS 5.1
  15. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  16. 2026-10-08 02:00 UTCEG score recompute
  17. 2026-10-08 02:00 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c · GitHub CVSS 5.1
  18. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-10-06 23:40 UTCEG score recompute
  20. 2026-10-06 23:40 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c · GitHub CVSS 5.1
  21. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  22. 2026-10-05 21:21 UTCEG score recompute
  23. 2026-10-05 21:21 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c · GitHub CVSS 5.1
  24. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  25. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  26. 2026-10-04 18:47 UTCEG score recompute
  27. 2026-10-04 18:47 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c · GitHub CVSS 5.1
  28. 2026-10-03 16:23 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c
  29. 2026-10-03 16:10 UTCEG score recomputeFirst assessed: 5.1 MEDIUM
  30. 2026-10-03 16:09 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c
  31. 2026-10-03 16:09 UTCMITRE cvelistV5CVSS v3 → 5.1 · severity → MEDIUM
  32. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  33. 2026-10-03 05:03 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c
  34. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  35. 2026-09-30 10:38 UTCEG score recompute
  36. 2026-09-30 10:38 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c
  37. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  38. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  39. 2026-09-27 16:01 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c
  40. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  41. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  42. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  43. 2026-09-24 21:37 UTCEG score recompute
  44. 2026-09-24 21:37 UTCGHSA enrichmentGHSA-8gfp-q62c-5p3c
  45. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  46. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  47. 2026-09-22 20:32 UTCNVD update
  48. 2026-09-22 19:48 UTCEG score recompute
  49. 2026-09-22 19:47 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-75432?
CVE-2026-75432 is a medium-severity vulnerability; its CVE record was published on September 22, 2026. An issue in yaml-cpp 0.9.0 allows a remote attacker to obtain sensitive information via the src/scanner.cpp, Scanner::PopIndent(), and Scanner::PushIndentTo() components
When was the CVE record for CVE-2026-75432 published?
The CVE record for CVE-2026-75432 was published on September 22, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 3, 2026; the record at its source may have been updated since.
Is CVE-2026-75432 actively exploited?
CVE-2026-75432 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-75432?
CVE-2026-75432 has a CVSS v3.1 base score of 5.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-75432?
An upstream fix for CVE-2026-75432 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-2026-75432 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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