CVE-2026-49263

LOWPre-NVD 2.02.0
EchelonGraph scoreMEDIUM confidence

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

This low-severity CVE scores 2.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (6th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
2.0EG
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: 0.2%CVSS: 2.0Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Capstone is a disassembly framework. Prior to version 6.0.0-Alpha9, Capstone's WebAssembly backend accepts attacker-controlled raw WASM instruction bytes through the public cs_disasm() and cs_disasm_iter() APIs. For a large but well-formed br_table instruction, the WASM decoder accumulates the immediate length in a wider local variable but returns it through a uint16_t instruction-size path. When the encoded instruction length is exactly 65,536 bytes, the size wraps to zero and cs_disasm() can repeatedly decode the same instruction without advancing. For larger lengths, cs_disasm_iter() advances into the middle of the br_table payload and decodes target bytes as subsequent instructions. This is an availability and parser-integrity issue. Version 6.0.0-Alpha9 patches the issue.

CVSS v3
2.0
EG Score
2.0LOWmedium confidence
EG Risk
25
EG Risk 25/100

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 (value × EchelonGraph’s weight)
Severity20% × 45%
The EG Score, 2.0 of 10.
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
0.2%
EPSS %ILE
6th
KEV
Not listed

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.

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 14, 2026

Last Modified

September 18, 2026

References (2)

Vendor Advisories for CVE-2026-49263(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
capstone4.0.2-5 ... 5.0.9-1 (11 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
capstone5.0.6-1, 5.0.7-1, 5.0.7-1~deb13u1, 5.0.7-2, 5.0.9-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
capstone5.0.6-1, 5.0.7-1, 5.0.7-1~deb13u1, 5.0.7-2, 5.0.9-1
  • 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 11× in last 7d / 33× 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.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  3. 2026-10-12 16:00 UTCEG score recompute
  4. 2026-10-11 19:43 UTCEG score recompute
  5. 2026-10-11 16:57 UTCEG score recompute
  6. 2026-10-11 14:21 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-10-04 08:48 UTCEG score recompute
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  18. 2026-10-01 06:58 UTCEG score recompute
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  20. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  21. 2026-09-28 05:10 UTCEG score recompute
  22. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  24. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  25. 2026-09-25 03:22 UTCEG score recompute
Show 43 more
  1. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  2. 2026-09-21 21:58 UTCEG score recompute
  3. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  4. 2026-09-18 20:09 UTCEG score recompute
  5. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-09-18 10:16 UTCEG score recompute
  7. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-09-15 08:27 UTCEG score recompute
  9. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-09-12 06:38 UTCEG score recompute
  11. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-09-09 04:49 UTCEG score recompute
  14. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-09-05 08:03 UTCEG score recompute
  18. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-09-02 06:14 UTCEG score recompute
  20. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-08-30 03:44 UTCEG score recompute
  24. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  26. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  27. 2026-08-27 01:55 UTCEG score recompute
  28. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  29. 2026-08-24 00:07 UTCEG score recompute
  30. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  31. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  32. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  33. 2026-08-20 22:19 UTCEG score recompute
  34. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  35. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  36. 2026-08-17 20:31 UTCEG score recompute
  37. 2026-08-17 20:04 UTCEG score recompute
  38. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  39. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  40. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  41. 2026-08-14 18:35 UTCEG score recompute
  42. 2026-08-14 18:09 UTCEG score recomputeFirst assessed: 2.0 LOW
  43. 2026-08-14 18:08 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-49263?
CVE-2026-49263 is a low-severity vulnerability; its CVE record was published on August 14, 2026. Capstone is a disassembly framework. Prior to version 6.0.0-Alpha9, Capstone's WebAssembly backend accepts attacker-controlled raw WASM instruction bytes through the public csdisasm() and csdisasmiter() APIs. For a large but well-formed brtable instruction, the WASM decoder accumulates the…
When was the CVE record for CVE-2026-49263 published?
The CVE record for CVE-2026-49263 was published on August 14, 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 18, 2026; the record at its source may have been updated since.
Is CVE-2026-49263 actively exploited?
CVE-2026-49263 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-49263?
CVE-2026-49263 has a CVSS base score of 2.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-49263?
A fix for CVE-2026-49263 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-49263 are linked in the Vendor Advisories panel on this page.

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