CVE-2026-100504

HIGHPre-NVD 7.07.0—
EchelonGraph scoreHIGH confidence

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2026-09-26. A secondary CVSS source baseline 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.0EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.0Exploit: 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.

Ghidra versions through 12.1.4 contain a stack-based out-of-bounds write vulnerability in the decompiler's leftshift128 function when processing negative shift amounts from p-code. Attackers can craft malicious binaries with specific instruction sequences that trigger the overflow when decompiled, corrupting memory and potentially achieving code execution.

CVSS v3
7.0
EG Score
7.0HIGHhigh confidence
EG Risk
32
EG Risk 32/100CISA SSVC

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
Severity70% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
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
0.1%
EPSS %ILE
2nd
KEV
Not listed

CISA SSVCTrack 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). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 26, 2026

Last Modified

September 30, 2026

Advisory Details (5)

Auto-updated Sep 26, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

Ghidra through 12.1.4 Stack-based Buffer Overflow via leftshift128 | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ghidra-through-12.1.4-stack-based-buffer-overflow-via-leftshift128
github_commit

commit 6babe3c1cec7 (NationalSecurityAgency/ghidra)

Fix landed in NationalSecurityAgency/ghidra commit 6babe3c1cec7 — awaiting tagged release

https://github.com/NationalSecurityAgency/ghidra/commit/6babe3c1cec7f5ec920dd16cdc86a02893e5b33c
generic

ghidra/Ghidra/Features/Decompiler/src/decompile/cpp/ruleaction.cc at 8b6bbb857accdfa20dc5b2f5dea471178c2e9fbc · NationalSecurityAgency/ghidra · GitHub

https://github.com/NationalSecurityAgency/ghidra/blob/8b6bbb857accdfa20dc5b2f5dea471178c2e9fbc/Ghidra/Features/Decompiler/src/decompile/cpp/ruleaction.cc#L7848-L7878
generic

ghidra/Ghidra/Features/Decompiler/src/decompile/cpp/multiprecision.cc at 8b6bbb857accdfa20dc5b2f5dea471178c2e9fbc · NationalSecurityAgency/ghidra · GitHub

https://github.com/NationalSecurityAgency/ghidra/blob/8b6bbb857accdfa20dc5b2f5dea471178c2e9fbc/Ghidra/Features/Decompiler/src/decompile/cpp/multiprecision.cc#L29-L61
generic

GitHub - NationalSecurityAgency/ghidra: Ghidra is a software reverse engineering (SRE) framework · GitHub

https://github.com/NationalSecurityAgency/ghidra

Vendor Advisories for CVE-2026-100504(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 31× in last 7d / 40× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-10-04 12:56 UTCGHSA enrichment
  2. 2026-10-04 01:31 UTCEG score recompute
  3. 2026-10-04 01:30 UTCGHSA enrichment
  4. 2026-10-03 14:25 UTCEPSS rescore
  5. 2026-10-03 14:01 UTCGHSA enrichment
  6. 2026-10-03 02:33 UTCEG score recompute
  7. 2026-10-03 02:33 UTCGHSA enrichment
  8. 2026-10-02 15:08 UTCGHSA enrichment
  9. 2026-10-02 03:43 UTCEG score recompute
  10. 2026-10-02 03:43 UTCGHSA enrichment
  11. 2026-10-01 19:49 UTCEPSS rescore
  12. 2026-10-01 16:18 UTCGHSA enrichment
  13. 2026-10-01 04:54 UTCGHSA enrichment
  14. 2026-09-30 17:27 UTCGHSA enrichment
  15. 2026-09-30 16:17 UTCEG score recompute
  16. 2026-09-30 16:17 UTCGHSA enrichment
  17. 2026-09-30 15:02 UTCEPSS rescore
  18. 2026-09-30 04:38 UTCGHSA enrichment
  19. 2026-09-29 17:12 UTCEG score recompute
  20. 2026-09-29 17:11 UTCGHSA enrichment
  21. 2026-09-29 15:20 UTCEPSS rescore
  22. 2026-09-29 05:46 UTCEG score recompute
  23. 2026-09-29 05:46 UTCGHSA enrichment
  24. 2026-09-28 18:22 UTCEG score recompute
  25. 2026-09-28 18:22 UTCGHSA enrichment
Show 15 more
  1. 2026-09-28 17:53 UTCEG score recompute
  2. 2026-09-28 17:52 UTCGHSA enrichment
  3. 2026-09-28 13:50 UTCEPSS rescore
  4. 2026-09-28 10:30 UTCGHSA enrichment
  5. 2026-09-27 23:05 UTCEG score recompute
  6. 2026-09-27 23:05 UTCGHSA enrichment
  7. 2026-09-27 11:39 UTCGHSA enrichment
  8. 2026-09-27 00:13 UTCEG score recompute
  9. 2026-09-27 00:13 UTCGHSA enrichment
  10. 2026-09-26 15:58 UTCEPSS rescore
  11. 2026-09-26 12:46 UTCEG score recompute
  12. 2026-09-26 12:46 UTCGHSA enrichment
  13. 2026-09-26 01:20 UTCEG score recompute
  14. 2026-09-26 01:12 UTCEG score recompute
  15. 2026-09-26 01:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-100504?
CVE-2026-100504 is a high vulnerability published on September 26, 2026. Ghidra versions through 12.1.4 contain a stack-based out-of-bounds write vulnerability in the decompiler's leftshift128 function when processing negative shift amounts from p-code. Attackers can craft malicious binaries with specific instruction sequences that trigger the overflow when decompiled,…
When was CVE-2026-100504 disclosed?
CVE-2026-100504 was first published on September 26, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-100504 actively exploited?
CVE-2026-100504 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100504?
CVE-2026-100504 has a CVSS base score of 7.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100504?
An upstream fix for CVE-2026-100504 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-2026-100504 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-100504

Explore →

Is Your Infrastructure Affected by CVE-2026-100504?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs