CVE-2026-102805

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-09-30. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.5Exploit: Elevated riskExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

A flaw has been found in Nothings stb up to 1.16. This affects the function stbi_write_png_to_mem/stbi_write_jpg_core/stbi_write_tga_core in the library stb_image_write.h of the component Image Encoding. Executing a manipulation can lead to integer overflow. The attack can be executed remotely. The exploit has been published and may be used.

CVSS v3
6.5
EG Score
6.5MEDIUMhigh confidence
EG Risk
60
EG Risk 60/100CISA 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
Severity65% × 45%
Exploitation40% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. 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, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
25th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. 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, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (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 30, 2026

Last Modified

October 1, 2026

Advisory Details (3)

Auto-updated Sep 30, 2026
No patch confirmed yet.
generic

GitHub - nothings/stb: stb single-file public domain libraries for C/C++ · GitHub

https://github.com/nothings/stb/
generic

[SECURITY] Integer overflow in stb_image_write.h leads to heap buffer overflow in PNG encoding and out-of-bounds reads in JPEG/TGA encoding · Issue #1964 · nothings/stb · GitHub

https://github.com/nothings/stb/issues/1964#issuecomment-5404606996
generic

[SECURITY] Integer overflow in stb_image_write.h leads to heap buffer overflow in PNG encoding and out-of-bounds reads in JPEG/TGA encoding · Issue #1964 · nothings/stb · GitHub

https://github.com/nothings/stb/issues/1964

Vendor Advisories for CVE-2026-102805(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 21× 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. 2026-10-03 18:36 UTCEG score recompute
  2. 2026-10-03 18:35 UTCGHSA enrichment
  3. 2026-10-03 14:25 UTCEPSS rescore
  4. 2026-10-02 17:34 UTCEG score recompute
  5. 2026-10-02 17:34 UTCGHSA enrichment
  6. 2026-10-01 19:49 UTCEPSS rescore
  7. 2026-10-01 16:37 UTCEG score recompute
  8. 2026-10-01 16:36 UTCGHSA enrichment
  9. 2026-10-01 16:24 UTCNVD updateCVSS v4 → 5.5
  10. 2026-10-01 15:56 UTCEG score recompute
  11. 2026-10-01 15:56 UTCGHSA enrichment
  12. 2026-10-01 15:55 UTCMITRE cvelistV5CVSS v4 → 6.9
  13. 2026-10-01 15:33 UTCEG score recompute
  14. 2026-10-01 15:33 UTCGHSA enrichment
  15. 2026-09-30 15:02 UTCEPSS rescore
  16. 2026-09-30 14:30 UTCEG score recompute
  17. 2026-09-30 14:30 UTCGHSA enrichment
  18. 2026-09-30 01:30 UTCEG score recompute
  19. 2026-09-30 01:29 UTCNVD updateCVSS v4 → 5.5
  20. 2026-09-30 00:35 UTCEG score recompute
  21. 2026-09-30 00:34 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-102805?
CVE-2026-102805 is a medium vulnerability published on September 30, 2026. A flaw has been found in Nothings stb up to 1.16. This affects the function stbiwritepngtomem/stbiwritejpgcore/stbiwritetgacore in the library stbimagewrite.h of the component Image Encoding. Executing a manipulation can lead to integer overflow. The attack can be executed remotely. The exploit has…
When was CVE-2026-102805 disclosed?
CVE-2026-102805 was first published on September 30, 2026, with the most recent update on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-102805 actively exploited?
CVE-2026-102805 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-102805?
CVE-2026-102805 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-102805?
No fix for CVE-2026-102805 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-102805 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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