CVE-2026-100505

MEDIUMPre-NVD 4.44.4—
EchelonGraph scoreHIGH confidence

Score 4.4 from GitHub Security Advisory published 2026-09-26. A secondary CVSS source baseline 4.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 4.4Exploit: 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 9.2 through 12.1.4 contain a heap out-of-bounds read vulnerability in StringManager::getCodepoint when decoding multi-byte UTF-8, UTF-16, or UTF-32 characters without validating remaining buffer length. Attackers can craft malicious binaries containing strings or constant byte stores that end in multi-byte lead units to trigger out-of-bounds reads that crash the decompiler or leak adjacent heap memory into decompiled output.

CVSS v3
4.4
EG Score
4.4MEDIUMhigh confidence
EG Risk
24
EG Risk 24/100CISA 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
Severity44% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend 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 at low or medium mission impact and sooner than that at high until it ships, then apply the release.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend 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 at low or medium mission impact and sooner than that at high until it ships, then apply the release.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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 28, 2026

Advisory Details (4)

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

Ghidra 11.2 through 12.1.4 Heap Out-of-Bounds Read via StringManager | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ghidra-11.2-through-12.1.4-heap-out-of-bounds-read-via-stringmanager
github_commit

commit e37c57f3d9c2 (NationalSecurityAgency/ghidra)

Fix landed in NationalSecurityAgency/ghidra commit e37c57f3d9c2 — awaiting tagged release

https://github.com/NationalSecurityAgency/ghidra/commit/e37c57f3d9c29511a1860f0a735df53131d403d7
generic

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

https://github.com/NationalSecurityAgency/ghidra/blob/8b6bbb857accdfa20dc5b2f5dea471178c2e9fbc/Ghidra/Features/Decompiler/src/decompile/cpp/stringmanage.cc#L324-L410
generic

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

https://github.com/NationalSecurityAgency/ghidra

Vendor Advisories for CVE-2026-100505(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 22× in last 7d / 30× 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. 2026-10-05 02:56 UTCEG score recompute
  2. 2026-10-05 02:56 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 02:17 UTCEG score recompute
  5. 2026-10-04 02:17 UTCGHSA enrichment
  6. 2026-10-03 14:25 UTCEPSS rescore
  7. 2026-10-03 01:42 UTCEG score recompute
  8. 2026-10-03 01:42 UTCGHSA enrichment
  9. 2026-10-02 01:07 UTCEG score recompute
  10. 2026-10-02 01:07 UTCGHSA enrichment
  11. 2026-10-01 19:49 UTCEPSS rescore
  12. 2026-10-01 00:28 UTCEG score recompute
  13. 2026-10-01 00:27 UTCGHSA enrichment
  14. 2026-09-30 15:02 UTCEPSS rescore
  15. 2026-09-29 23:49 UTCEG score recompute
  16. 2026-09-29 23:49 UTCGHSA enrichment
  17. 2026-09-29 15:20 UTCEPSS rescore
  18. 2026-09-28 21:18 UTCGHSA enrichment
  19. 2026-09-28 20:50 UTCEG score recompute
  20. 2026-09-28 20:50 UTCGHSA enrichment
  21. 2026-09-28 20:26 UTCEG score recompute
  22. 2026-09-28 20:26 UTCGHSA enrichment
  23. 2026-09-28 02:32 UTCEG score recompute
  24. 2026-09-28 02:32 UTCGHSA enrichment
  25. 2026-09-27 01:55 UTCEG score recompute
Show 5 more
  1. 2026-09-27 01:55 UTCGHSA enrichment
  2. 2026-09-26 15:58 UTCEPSS rescore
  3. 2026-09-26 01:20 UTCEG score recompute
  4. 2026-09-26 01:12 UTCEG score recompute
  5. 2026-09-26 01:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-100505?
CVE-2026-100505 is a medium vulnerability published on September 26, 2026. Ghidra versions 9.2 through 12.1.4 contain a heap out-of-bounds read vulnerability in StringManager::getCodepoint when decoding multi-byte UTF-8, UTF-16, or UTF-32 characters without validating remaining buffer length. Attackers can craft malicious binaries containing strings or constant byte…
When was CVE-2026-100505 disclosed?
CVE-2026-100505 was first published on September 26, 2026, with the most recent update on September 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-100505 actively exploited?
CVE-2026-100505 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100505?
CVE-2026-100505 has a CVSS base score of 4.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100505?
An upstream fix for CVE-2026-100505 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-2026-100505 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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