CVE-2026-76883

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.1% (2nd percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 4.7 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-08-20) is not newer than that change (2026-09-17), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated

Also known asEUVD-2026-63140 (ENISA EUVD) · GHSA-qfrc-4462-rghv (GitHub Security Advisories)Source: ENISA EUVD

5.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Fixed versions, as the CVE record's CNA (GitLab Inc.) states them: "Upgrade to version 4.6.8 or above".

Catapult DCT2000 file parser crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
41
EG Risk 41/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 19, 2026

Last Modified

September 17, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
Patch available.
Web page

Heap OOB write in wiretap/catapult_dct2000.c:1382 - off-by-one in DCT2000 file reader (#21427) · Issues · Wireshark Foundation / Wireshark · GitLab

https://gitlab.com/wireshark/wireshark/-/work_items/21427
Web page

Wireshark • Go Deep | Wireshark • wnpa-sec-2026-74 Catapult DCT2000 file parser crash

https://www.wireshark.org/security/wnpa-sec-2026-74.html

Vendor Advisories for CVE-2026-76883(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.0.10-1 ... 4.6.6-2 (50 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.4.13-0+deb13u1 ... 4.4.9-1 (7 versions)
  • every version up to 4.4.18-0+deb13u1: fixed in 4.4.18-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.4.7-1 ... 4.6.6-2 (16 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 44× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 159 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 59 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-30 05:25 UTCOSV refresh
  6. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-10-25 14:01 UTCEG score recompute
  11. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-22 18:45 UTCEG score recompute
  14. 2026-10-22 18:45 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  15. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-18 03:12 UTCEG score recompute
  20. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
Show 75 more
  1. 2026-10-12 15:38 UTCEG score recompute
  2. 2026-10-11 19:23 UTCEG score recompute
  3. 2026-10-11 16:39 UTCEG score recompute
  4. 2026-10-11 13:58 UTCEG score recompute
  5. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-10-08 05:56 UTCEG score recompute
  10. 2026-10-08 05:56 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-07 04:47 UTCEG score recompute
  13. 2026-10-07 04:47 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-10-06 03:39 UTCEG score recompute
  16. 2026-10-06 03:39 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  17. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-04 21:21 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  20. 2026-10-03 16:51 UTCEG score recompute
  21. 2026-10-03 16:51 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  22. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-10-02 11:06 UTCEG score recompute
  24. 2026-10-02 11:06 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  25. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  26. 2026-10-01 09:31 UTCEG score recompute
  27. 2026-10-01 09:31 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  28. 2026-09-30 08:28 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  29. 2026-09-29 06:20 UTCEG score recompute
  30. 2026-09-29 06:20 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  31. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  32. 2026-09-28 05:17 UTCEG score recompute
  33. 2026-09-28 05:17 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  34. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  35. 2026-09-27 04:15 UTCEG score recompute
  36. 2026-09-27 04:15 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  37. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  38. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  39. 2026-09-25 03:59 UTCEG score recompute
  40. 2026-09-25 03:59 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  41. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  42. 2026-09-24 02:56 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  43. 2026-09-23 01:53 UTCEG score recompute
  44. 2026-09-23 01:53 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  45. 2026-09-22 16:01 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  46. 2026-09-22 00:49 UTCEG score recompute
  47. 2026-09-22 00:49 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  48. 2026-09-21 21:09 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  49. 2026-09-20 23:46 UTCEG score recompute
  50. 2026-09-20 23:46 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  51. 2026-09-20 20:16 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  52. 2026-09-19 22:43 UTCEG score recompute
  53. 2026-09-19 22:43 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  54. 2026-09-18 21:41 UTCEG score recompute
  55. 2026-09-18 21:41 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  56. 2026-09-18 19:28 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  57. 2026-09-17 19:08 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  58. 2026-09-17 13:32 UTCEG score recompute
  59. 2026-09-17 13:32 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  60. 2026-09-16 14:08 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  61. 2026-09-16 12:20 UTCEG score recompute
  62. 2026-09-16 12:20 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  63. 2026-09-16 05:15 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  64. 2026-09-15 11:17 UTCEG score recompute
  65. 2026-09-15 11:17 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  66. 2026-09-15 03:12 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  67. 2026-09-14 10:07 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  68. 2026-09-13 09:03 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  69. 2026-09-12 08:00 UTCEG score recompute
  70. 2026-09-12 08:00 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  71. 2026-09-11 14:53 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  72. 2026-09-11 06:57 UTCEG score recompute
  73. 2026-09-11 06:57 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7
  74. 2026-09-10 09:35 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  75. 2026-09-10 05:54 UTCGHSA enrichmentGHSA-qfrc-4462-rghv · GitHub CVSS 4.7

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-76883?
CVE-2026-76883 is a medium-severity vulnerability; its CVE record was published on August 19, 2026. Catapult DCT2000 file parser crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
When was the CVE record for CVE-2026-76883 published?
The CVE record for CVE-2026-76883 was published on August 19, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 17, 2026; the record at its source may have been updated since.
Is CVE-2026-76883 actively exploited?
CVE-2026-76883 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-2026-76883?
CVE-2026-76883 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-76883?
A fix for CVE-2026-76883 is available: update to the fixed version the vendor names in its advisory. Fixed versions, as the CVE record's CNA (GitLab Inc.) states them: "Upgrade to version 4.6.8 or above". The vendor advisories EchelonGraph has for CVE-2026-76883 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-76883

Explore →

Is Your Infrastructure Affected by CVE-2026-76883?

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

Book a Demo →Browse All CVEs