Wire provides gRPC and protocol buffers for Android, Kotlin, Swift, and Java. Prior to 6.4.1 and 7.0.0-alpha04, Wire's Swift runtime ProtoReader.skipGroup(expectedEndTag:unknownFieldsWriter:) accepts a negative length for a LENGTH_DELIMITED field inside an unknown START_GROUP field. ProtoReader.readData() forwards the negative count to ReadBuffer.readData(count:), whose upper-bound-only check permits the value to reach Foundation Data(bytes:count:) and trigger an unrecoverable process trap instead of a catchable ProtoDecoder.Error. Any Swift process decoding untrusted protobuf bytes can be crashed without authentication, user interaction, or knowledge of the target schema. This issue is fixed in versions 6.4.1 and 7.0.0-alpha04.
CVE-2026-61695
“—” beside the score: it is equal to the CVSS score beside it.
Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-23. A secondary CVSS source baseline 7.5; sources differ by 0.0.
Also known asEUVD-2026-85559 (ENISA EUVD) · GHSA-86wm-r4c5-2rc9 (GitHub Security Advisories)Source: ENISA EUVD
- CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
A fixed version is listed under Patch Availability — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 65EG Risk 65/100
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)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 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.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 fixed version is listed under Patch Availability. 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
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.7% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). 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; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days 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; Attend at high (mission-essential systems).
A fixed version is listed under Patch Availability. 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.
The score's inputs: 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
September 23, 2026
Last Modified
September 30, 2026
Advisory Details (4)
Auto-updated Sep 23, 2026commit 81ff7f24a679 (square/wire)
Fix landed in square/wire commit 81ff7f24a679 — awaiting tagged release
https://github.com/square/wire/commit/81ff7f24a6795d9a8be2e03f272b2d979a5d2c7ecommit 24043b6b3a5e (square/wire)
Fix landed in square/wire commit 24043b6b3a5e — awaiting tagged release
https://github.com/square/wire/commit/24043b6b3a5e5974a978f2745b76d50b31407c1cAdd negative-length check in skipGroup for the Swift runtime
Fix merged in square/wire PR #3616 on 2026-06-17 — awaiting tagged release
https://github.com/square/wire/pull/3616Wire Swift runtime: negative LENGTH_DELIMITED length in skipGroup() crashes any protobuf-decoding service (Swift sibling of GHSA-7xpr-hc2w-34m9) · Advisory · square/wire · GitHub
https://github.com/square/wire/security/advisories/GHSA-86wm-r4c5-2rc9Vendor Advisories for CVE-2026-61695(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(1)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| swift | github.com/square/wire @ 6.4.1 (fixes <= 6.4.0) | — | ghsa |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 48× 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.
- 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-11-01 07:41 UTCGHSA enrichmentGHSA-86wm-r4c5-2rc9 · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-11-01 07:41 UTCEG score recompute
- 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-28 06:05 UTCEG score recompute
- 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
- 2026-10-25 14:14 UTCEG score recompute
- 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-20 18:53 UTCEG score recompute
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-18 03:25 UTCEG score recompute
- 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
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- 2026-10-13 13:22 UTCEG score recompute
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-12 15:50 UTCEG score recompute
- 2026-10-11 19:34 UTCEG score recompute
- 2026-10-11 16:49 UTCEG score recompute
- 2026-10-11 14:11 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-11 02:50 UTCEG score recompute
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-10 03:44 UTCEG score recompute
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-09 04:38 UTCEG score recompute
- 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-08 01:09 UTCEG score recompute
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-07 02:01 UTCEG score recompute
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-06 02:55 UTCEG score recompute
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-05 03:45 UTCEG score recompute
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-03 17:03 UTCEG score recompute
- 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-02 17:57 UTCEG score recompute
- 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-02 06:24 UTCEG score recompute
- 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-30 19:44 UTCEG score recompute
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-30 02:38 UTCEG score recompute
- 2026-09-29 03:33 UTCEG score recompute
- 2026-09-29 02:36 UTCEG score recompute
- 2026-09-28 15:40 UTCEG score recompute
- 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-27 16:33 UTCEG score recompute
- 2026-09-26 17:28 UTCEG score recompute
- 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-09-26 05:55 UTCEG score recompute
- 2026-09-24 18:24 UTCEG score recompute
- 2026-09-23 19:18 UTCEG score recompute
- 2026-09-23 18:49 UTCEG score recomputeFirst assessed: 7.5 HIGH
- 2026-09-23 18:49 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-61695?
When was the CVE record for CVE-2026-61695 published?
Is CVE-2026-61695 actively exploited?
What is the CVSS score of CVE-2026-61695?
How do I remediate CVE-2026-61695?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-61695
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