CVE-2026-45799

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7% (52nd 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
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (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: 0.7%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

Wire provides gRPC and protocol buffers for Android, Kotlin, Swift, and Java. Prior to 6.3.0 and 7.0.0-alpha03, ByteArrayProtoReader32.skipGroup() and ProtoReader.skipGroup() in wire-runtime do not validate that a LENGTH_DELIMITED field length is non-negative before skip(), allowing a crafted protobuf varint encoding -128 as a signed Int to make skip(-128) move the internal position negative and make the next readByte() throw ArrayIndexOutOfBoundsException instead of the documented IOException or ProtocolException, which can crash services using ProtoAdapter.decode(byte[]) on untrusted payloads. This issue is fixed in versions 6.3.0 and 7.0.0-alpha03.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

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)
Severity75% × 45%
The EG Score, 7.5 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
52nd
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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

May 19, 2026

Last Modified

August 12, 2026

Advisory Details (5)

Auto-updated Jul 17, 2026
Patch available. Sources: github, github_commit, github_pr.
GitHub advisoryMentions a patch (unverified)

skipGroup() missing negative-length check allows 10-byte payload to crash any Wire-decoding service · Advisory · square/wire · GitHub

https://github.com/square/wire/security/advisories/GHSA-7xpr-hc2w-34m9
GitHub pull request

Add negative-length check in skipGroup

Fix merged in square/wire PR #3597 on 2026-05-13 — awaiting tagged release

https://github.com/square/wire/pull/3597
GitHub pull request

Add negative-length check in skipGroup

Fix merged in square/wire PR #3595 on 2026-05-12 — awaiting tagged release

https://github.com/square/wire/pull/3595
GitHub commit

commit e4e56fab38a5 (square/wire)

Fix landed in square/wire commit e4e56fab38a5 — awaiting tagged release

https://github.com/square/wire/commit/e4e56fab38a547d9625f05c97f1d8f0bcc3a5773
GitHub commit

commit 47d5b0dba539 (square/wire)

Fix landed in square/wire commit 47d5b0dba539 — awaiting tagged release

https://github.com/square/wire/commit/47d5b0dba53935d5332cd41a80a353b3fc90e7b0

Vendor Advisories for CVE-2026-45799(2)

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

Affected Packages

(2 across 1 ecosystem)
Maven(2)
PackageVulnerable rangeFix by version rangeDependents
com.squareup.wire:wire-runtime7.0.0-alpha01, 7.0.0-alpha02
  • every version up to 6.3.0: fixed in 6.3.0
  • 7.0.0-alpha01 up to 7.0.0-alpha03: fixed in 7.0.0-alpha03
—
com.squareup.wire:wire-runtime-jvm7.0.0-alpha01, 7.0.0-alpha02
  • every version up to 6.3.0: fixed in 6.3.0
  • 7.0.0-alpha01 up to 7.0.0-alpha03: fixed in 7.0.0-alpha03
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 26× 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 99 of 101 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 2 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  2. 2026-10-12 16:04 UTCEG score recompute
  3. 2026-10-11 19:46 UTCEG score recompute
  4. 2026-10-11 17:00 UTCEG score recompute
  5. 2026-10-11 14:26 UTCEG score recompute
  6. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  7. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  8. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  9. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  10. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  11. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  12. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  13. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  14. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  15. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  16. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  17. 2026-09-30 03:39 UTCOSV refresh
  18. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  19. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  20. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  21. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  22. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  23. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  24. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  25. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 44th percentile
Show 74 more
  1. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  2. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  4. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  5. 2026-09-11 05:53 UTCOSV refresh
  6. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  7. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  8. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  9. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  10. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  11. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  12. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  13. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  14. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  15. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  16. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  17. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  19. 2026-08-23 17:00 UTCEG score recompute
  20. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  21. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-08-21 23:36 UTCEG score recompute
  23. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  24. 2026-08-20 19:00 UTCEG score recompute
  25. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  26. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  27. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  28. 2026-08-16 16:56 UTCEG score recompute
  29. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  30. 2026-08-16 03:33 UTCEG score recompute
  31. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  32. 2026-08-15 03:24 UTCEG score recompute
  33. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  34. 2026-08-14 02:06 UTCEG score recompute
  35. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  36. 2026-08-12 14:38 UTCEG score recompute
  37. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  38. 2026-08-11 13:53 UTCEG score recompute
  39. 2026-08-11 00:38 UTCEG score recompute
  40. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  41. 2026-08-09 14:40 UTCEG score recompute
  42. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  43. 2026-08-09 02:22 UTCEG score recompute
  44. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  45. 2026-08-08 01:44 UTCEG score recompute
  46. 2026-08-07 01:07 UTCEG score recompute
  47. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  48. 2026-08-05 21:20 UTCEG score recompute
  49. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  50. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  51. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  52. 2026-08-03 16:57 UTCEG score recompute
  53. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  54. 2026-08-02 06:54 UTCEG score recompute
  55. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  56. 2026-08-01 17:52 UTCEG score recompute
  57. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  58. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  59. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  60. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  61. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  62. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  63. 2026-07-26 08:19 UTCEG score recompute
  64. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  65. 2026-07-24 14:17 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  66. 2026-07-23 14:18 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  67. 2026-07-23 03:16 UTCEG score recompute
  68. 2026-07-22 14:08 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  69. 2026-07-21 15:24 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  70. 2026-07-20 17:08 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  71. 2026-07-19 14:31 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  72. 2026-07-19 02:29 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  73. 2026-06-14 23:18 UTCEPSS rescoreEPSS <0.1% · 17th percentile
  74. 2026-06-13 23:00 UTCEPSS rescoreEPSS <0.1% · 17th percentile

Related CVEs(same product + same CWE)

Same product

2 shown

Maven:com.squareup.wire:wire-runtime

Frequently asked(5)

What is CVE-2026-45799?
CVE-2026-45799 is a high-severity vulnerability; its CVE record was published on May 19, 2026. Wire provides gRPC and protocol buffers for Android, Kotlin, Swift, and Java. Prior to 6.3.0 and 7.0.0-alpha03, ByteArrayProtoReader32.skipGroup() and ProtoReader.skipGroup() in wire-runtime do not validate that a LENGTH_DELIMITED field length is non-negative before skip(), allowing a crafted…
When was the CVE record for CVE-2026-45799 published?
The CVE record for CVE-2026-45799 was published on May 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 August 12, 2026; the record at its source may have been updated since.
Is CVE-2026-45799 actively exploited?
CVE-2026-45799 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (52nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-45799?
CVE-2026-45799 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-45799?
A fix for CVE-2026-45799 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-45799 are linked in the Vendor Advisories panel on this page.

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