CVE-2026-15520

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory (severity: LOW) published 2026-07-13. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Elevated
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.3Exploit: NoneExposed: 0

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

A vulnerability was determined in GNU LibreDWG 0.13.4-154-g0b573035. This impacts the function decompress_R2004_section of the file src/decode.c of the component R2004 Section Decompression. Executing a manipulation can lead to heap-based buffer overflow. The attack requires local access. The exploit has been publicly disclosed and may be utilized. Upgrading to version 0.14.8396 will fix this issue. This patch is called 3d0f9fc2eddbd6579c99af3111c37c98f03475d0. You should upgrade the affected component.

CVSS v3
5.3
EG Score
5.3(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

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
Severity53% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
3.5%
KEV
Not listed

Published

July 13, 2026

Last Modified

July 13, 2026

Advisory Details (5)

Auto-updated Jul 13, 2026
Patch available. Sources: github_commit, github_release.
generic

The GNU Operating System and the Free Software Movement

https://www.gnu.org/
github_release Patch Available

0.14.8396

Patch available: LibreDWG/libredwg 0.14.8396 (pre-release)

https://github.com/LibreDWG/libredwg/releases/tag/0.14.8396
github_commit

commit 3d0f9fc2eddb (LibreDWG/libredwg)

Fix landed in LibreDWG/libredwg commit 3d0f9fc2eddb — awaiting tagged release

https://github.com/LibreDWG/libredwg/commit/3d0f9fc2eddbd6579c99af3111c37c98f03475d0
generic

CVE-Repos/libredwg/libredwg_0b57303_heap_overflow_decompress_R2004_section.dwg at main · HackC0der/CVE-Repos · GitHub

https://github.com/HackC0der/CVE-Repos/blob/main/libredwg/libredwg_0b57303_heap_overflow_decompress_R2004_section.dwg
generic

Heap-buffer-overflow WRITE in decompress_R2004_section at decode.c:1295 (libredwg main branch @0b57303) · Issue #1251 · LibreDWG/libredwg · GitHub

https://github.com/LibreDWG/libredwg/issues/1251

Vendor Advisories for CVE-2026-15520(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 8× 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. 2026-07-24 14:17 UTCEPSS rescore
  2. 2026-07-23 14:18 UTCEPSS rescore
  3. 2026-07-23 03:05 UTCEG score recompute
  4. 2026-07-22 14:08 UTCEPSS rescore
  5. 2026-07-21 15:24 UTCEPSS rescore
  6. 2026-07-20 17:08 UTCEPSS rescore
  7. 2026-07-19 14:30 UTCEPSS rescore
  8. 2026-07-19 02:28 UTCEPSS rescore
  9. 2026-07-18 10:04 UTCEPSS rescore
  10. 2026-07-16 17:02 UTCEPSS rescore
  11. 2026-07-16 06:40 UTCGHSA enrichment
  12. 2026-07-15 16:57 UTCEPSS rescore
  13. 2026-07-15 05:01 UTCGHSA enrichment
  14. 2026-07-15 02:00 UTCEPSS rescore
  15. 2026-07-14 03:24 UTCGHSA enrichment
  16. 2026-07-13 22:30 UTCEPSS rescore
  17. 2026-07-13 18:08 UTCNVD updateCVSS v4 → 1.9
  18. 2026-07-13 16:22 UTCMITRE cvelistV5CVSS v4 → 4.8
  19. 2026-07-13 02:18 UTCNVD updateCVSS v4 → 1.9
  20. 2026-07-13 01:48 UTCEG score recompute
  21. 2026-07-13 01:47 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15520?
CVE-2026-15520 is a medium vulnerability published on July 13, 2026. A vulnerability was determined in GNU LibreDWG 0.13.4-154-g0b573035. This impacts the function decompressR2004section of the file src/decode.c of the component R2004 Section Decompression. Executing a manipulation can lead to heap-based buffer overflow. The attack requires local access. The exploit…
When was CVE-2026-15520 disclosed?
CVE-2026-15520 was first published in the National Vulnerability Database on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15520 actively exploited?
CVE-2026-15520 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-15520?
CVE-2026-15520 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-15520?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15520, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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