CVE-2026-20911

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-07. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

A heap-based buffer overflow vulnerability exists in the HuffTable::initval functionality of LibRaw Commit 0b56545 and Commit d20315b. A specially crafted malicious file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

April 7, 2026

Last Modified

July 15, 2026

Advisory Details (5)

Auto-updated Sep 12, 2026
Patch available. Sources: redhat.
redhat

Affected: Red Hat Enterprise Linux 6",

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-20911.json
redhat

2455959 – (CVE-2026-20911) CVE-2026-20911 LibRaw: LibRaw: Arbitrary Code Execution via specially crafted file

https://bugzilla.redhat.com/show_bug.cgi?id=2455959
redhat Patch Available

CVE-2026-20911 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-20911
generic

TALOS-2026-2330 || Cisco Talos Intelligence Group - Comprehensive Threat Intelligence

https://www.talosintelligence.com/vulnerability_reports/TALOS-2026-2330
generic

TALOS-2026-2330 || Cisco Talos Intelligence Group - Comprehensive Threat Intelligence

https://talosintelligence.com/vulnerability_reports/TALOS-2026-2330

Vendor Advisories for CVE-2026-20911(1)

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

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libraw0.21.4-2 ... 0.22.1-1~exp2 (7 versions)0.22.1-1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 29× 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.

Showing the most recent 100 of 228 total refreshes for this CVE.

  1. 2026-09-13 16:47 UTCEPSS rescore
  2. 2026-09-12 15:01 UTCEPSS rescore
  3. 2026-09-11 14:52 UTCEPSS rescore
  4. 2026-09-10 09:34 UTCEPSS rescore
  5. 2026-09-08 22:00 UTCEPSS rescore
  6. 2026-09-07 16:01 UTCEPSS rescore
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-06 13:47 UTCEPSS rescore
  9. 2026-09-04 05:06 UTCEPSS rescore
  10. 2026-09-03 00:30 UTCOSV refresh
  11. 2026-09-02 14:11 UTCEPSS rescore
  12. 2026-09-01 13:53 UTCEPSS rescore
  13. 2026-09-01 04:39 UTCEPSS rescore
  14. 2026-08-30 19:17 UTCEPSS rescore
  15. 2026-08-30 01:22 UTCEPSS rescore
  16. 2026-08-28 21:41 UTCEPSS rescore
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 14:46 UTCEPSS rescore
  19. 2026-08-25 13:48 UTCEPSS rescore
  20. 2026-08-23 00:19 UTCEPSS rescore
  21. 2026-08-21 23:49 UTCEPSS rescore
  22. 2026-08-20 22:55 UTCEPSS rescore
  23. 2026-08-19 17:03 UTCEPSS rescore
  24. 2026-08-18 13:48 UTCEPSS rescore
  25. 2026-08-17 13:47 UTCEPSS rescore
Show 75 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 12:35 UTCGHSA enrichment
  3. 2026-08-16 08:18 UTCEG score recompute
  4. 2026-08-16 08:18 UTCGHSA enrichment
  5. 2026-08-16 02:14 UTCEPSS rescore
  6. 2026-08-15 01:30 UTCEPSS rescore
  7. 2026-08-14 23:00 UTCGHSA enrichment
  8. 2026-08-14 18:44 UTCGHSA enrichment
  9. 2026-08-14 14:01 UTCGHSA enrichment
  10. 2026-08-14 09:44 UTCGHSA enrichment
  11. 2026-08-14 05:28 UTCEG score recompute
  12. 2026-08-14 05:28 UTCGHSA enrichment
  13. 2026-08-13 22:00 UTCEPSS rescore
  14. 2026-08-13 09:41 UTCGHSA enrichment
  15. 2026-08-13 04:15 UTCGHSA enrichment
  16. 2026-08-12 23:58 UTCGHSA enrichment
  17. 2026-08-12 19:42 UTCEG score recompute
  18. 2026-08-12 19:42 UTCGHSA enrichment
  19. 2026-08-12 13:50 UTCEPSS rescore
  20. 2026-08-12 00:15 UTCGHSA enrichment
  21. 2026-08-11 19:54 UTCEG score recompute
  22. 2026-08-11 19:54 UTCGHSA enrichment
  23. 2026-08-11 13:42 UTCEPSS rescore
  24. 2026-08-11 07:31 UTCGHSA enrichment
  25. 2026-08-11 03:15 UTCEG score recompute
  26. 2026-08-11 03:15 UTCGHSA enrichment
  27. 2026-08-11 00:00 UTCEPSS rescore
  28. 2026-08-10 10:30 UTCGHSA enrichment
  29. 2026-08-10 06:14 UTCGHSA enrichment
  30. 2026-08-10 01:55 UTCGHSA enrichment
  31. 2026-08-09 21:28 UTCGHSA enrichment
  32. 2026-08-09 17:11 UTCEG score recompute
  33. 2026-08-09 17:11 UTCGHSA enrichment
  34. 2026-08-09 13:46 UTCEPSS rescore
  35. 2026-08-09 12:55 UTCGHSA enrichment
  36. 2026-08-09 04:58 UTCEG score recompute
  37. 2026-08-09 04:58 UTCGHSA enrichment
  38. 2026-08-08 16:37 UTCEPSS rescore
  39. 2026-08-08 08:04 UTCGHSA enrichment
  40. 2026-08-08 03:47 UTCGHSA enrichment
  41. 2026-08-07 23:31 UTCGHSA enrichment
  42. 2026-08-07 19:14 UTCEG score recompute
  43. 2026-08-07 19:14 UTCGHSA enrichment
  44. 2026-08-07 14:58 UTCGHSA enrichment
  45. 2026-08-06 17:36 UTCEG score recompute
  46. 2026-08-06 17:36 UTCGHSA enrichment
  47. 2026-08-06 13:46 UTCEPSS rescore
  48. 2026-08-06 12:59 UTCGHSA enrichment
  49. 2026-08-06 08:33 UTCGHSA enrichment
  50. 2026-08-06 04:17 UTCGHSA enrichment
  51. 2026-08-06 00:01 UTCEG score recompute
  52. 2026-08-06 00:01 UTCGHSA enrichment
  53. 2026-08-05 19:17 UTCEPSS rescore
  54. 2026-08-04 15:10 UTCEPSS rescore
  55. 2026-08-04 10:38 UTCEPSS rescore
  56. 2026-08-04 03:43 UTCGHSA enrichment
  57. 2026-08-03 22:24 UTCEG score recompute
  58. 2026-08-03 22:24 UTCGHSA enrichment
  59. 2026-08-03 10:35 UTCEPSS rescore
  60. 2026-08-02 22:52 UTCGHSA enrichment
  61. 2026-08-02 18:36 UTCGHSA enrichment
  62. 2026-08-02 14:19 UTCEG score recompute
  63. 2026-08-02 14:19 UTCGHSA enrichment
  64. 2026-08-02 02:26 UTCEPSS rescore
  65. 2026-08-01 04:15 UTCEPSS rescore
  66. 2026-07-30 01:30 UTCEPSS rescore
  67. 2026-07-27 14:13 UTCEPSS rescore
  68. 2026-07-26 14:54 UTCEPSS rescore
  69. 2026-07-26 14:54 UTCEPSS rescore
  70. 2026-07-25 14:17 UTCEPSS rescore
  71. 2026-07-25 14:17 UTCEPSS rescore
  72. 2026-07-24 14:17 UTCEPSS rescore
  73. 2026-07-23 14:18 UTCEPSS rescore
  74. 2026-07-23 14:18 UTCEPSS rescore
  75. 2026-07-23 03:06 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-20911?
CVE-2026-20911 is a critical vulnerability published on April 7, 2026. A heap-based buffer overflow vulnerability exists in the HuffTable::initval functionality of LibRaw Commit 0b56545 and Commit d20315b. A specially crafted malicious file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.
When was CVE-2026-20911 disclosed?
CVE-2026-20911 was first published in the National Vulnerability Database on April 7, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20911 actively exploited?
CVE-2026-20911 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 51.7% of all scored CVEs.
What is the CVSS score of CVE-2026-20911?
CVE-2026-20911 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-20911?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20911, 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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