CVE-2026-48863

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-16. The CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 3 sources updated this week

Also known asEUVD-2026-44842 (ENISA EUVD) · GHSA-p3x5-f8vr-q28x (GitHub Security Advisories)Source: ENISA EUVD

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).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in libsolv. A stack-based buffer overflow vulnerability exists in the PGP verification component due to incorrect length handling when copying EdDSA 's' MPI into a stack buffer. A remote attacker could craft a malicious Ed25519 PGP signature with mismatched MPI lengths. Processing this crafted signature could lead to a denial of service in automated package or repository processing workflows.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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.
Exploitation0.8% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
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 none (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
0.8%
EPSS %ILE
57th
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
0.8% 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; 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: 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 fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (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

July 16, 2026

Last Modified

September 1, 2026

Advisory Details (3)

Auto-updated Jul 16, 2026
Patch available. Sources: redhat, github_commit.
GitHub commit

commit 44f8c085045b (openSUSE/libsolv)

Fix landed in openSUSE/libsolv commit 44f8c085045b — awaiting tagged release

https://github.com/openSUSE/libsolv/commit/44f8c085045b1f771641091bbb2b810d12cff9e8#diff-309f245ec9b669ec78b8159c39e6f50130b4d4a0448f742685f7833d04bc4caaR592
Red Hat

2460975 – (CVE-2026-48863) CVE-2026-48863 libsolv: Stack-based buffer overflow in libsolv EdDSA PGP signature verification allows denial of service

https://bugzilla.redhat.com/show_bug.cgi?id=2460975
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-48863

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libsolv0.7.17-1 ... 0.7.39-1 (25 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libsolv0.7.23-1 ... 0.7.40-1 (22 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libsolv0.7.32-1 ... 0.7.40-1 (8 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libsolv0.7.32-1, 0.7.35-1, 0.7.36-1, 0.7.37-1
  • every version up to 0.7.38-1: fixed in 0.7.38-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× 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 313 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 213 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.8% · 57th percentile
  2. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.8% · 57th percentile
  3. 2026-10-25 14:23 UTCEG score recompute
  4. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  5. 2026-10-24 06:44 UTCEG score recompute
  6. 2026-10-24 06:44 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  7. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  8. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  9. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  10. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  11. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  12. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  13. 2026-10-18 03:34 UTCEG score recompute
  14. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  15. 2026-10-17 12:14 UTCEG score recompute
  16. 2026-10-17 12:14 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  17. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  18. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  19. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  20. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  21. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  22. 2026-10-12 16:00 UTCEG score recompute
  23. 2026-10-11 19:43 UTCEG score recompute
  24. 2026-10-11 16:58 UTCEG score recompute
  25. 2026-10-11 14:22 UTCEG score recompute
Show 75 more
  1. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  2. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  3. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  4. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  5. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  6. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  7. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  8. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  9. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  10. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  11. 2026-10-01 12:34 UTCEG score recompute
  12. 2026-10-01 12:34 UTCVendor advisory
  13. 2026-10-01 12:34 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  15. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  16. 2026-09-28 08:39 UTCEG score recompute
  17. 2026-09-28 08:39 UTCVendor advisory
  18. 2026-09-28 08:39 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  20. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  21. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  22. 2026-09-24 08:43 UTCEG score recompute
  23. 2026-09-24 08:43 UTCVendor advisory
  24. 2026-09-24 08:43 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  25. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  26. 2026-09-23 03:10 UTCEG score recompute
  27. 2026-09-23 03:10 UTCVendor advisory
  28. 2026-09-23 03:10 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  29. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  30. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  31. 2026-09-18 04:41 UTCEG score recompute
  32. 2026-09-18 04:41 UTCVendor advisory
  33. 2026-09-18 04:41 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  34. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  35. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  36. 2026-09-14 12:21 UTCVendor advisory
  37. 2026-09-14 12:21 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  38. 2026-09-13 23:10 UTCEG score recompute
  39. 2026-09-13 23:10 UTCVendor advisory
  40. 2026-09-13 23:10 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  41. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  42. 2026-09-13 07:10 UTCEG score recompute
  43. 2026-09-13 07:10 UTCVendor advisory
  44. 2026-09-13 07:10 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  45. 2026-09-12 12:51 UTCVendor advisory
  46. 2026-09-12 12:50 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  47. 2026-09-11 21:43 UTCEG score recompute
  48. 2026-09-11 21:43 UTCVendor advisory
  49. 2026-09-11 21:43 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  50. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  51. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  52. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  53. 2026-09-08 00:39 UTCEG score recompute
  54. 2026-09-08 00:39 UTCVendor advisory
  55. 2026-09-08 00:39 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  56. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  57. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  58. 2026-09-06 13:27 UTCVendor advisory
  59. 2026-09-06 13:27 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  60. 2026-09-05 20:44 UTCEG score recompute
  61. 2026-09-05 20:44 UTCVendor advisory
  62. 2026-09-05 20:44 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  63. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  64. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  65. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  66. 2026-09-01 12:18 UTCEG score recompute
  67. 2026-09-01 12:18 UTCVendor advisory
  68. 2026-09-01 12:18 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  69. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  70. 2026-08-31 15:39 UTCEG score recompute
  71. 2026-08-31 15:39 UTCVendor advisory
  72. 2026-08-31 15:39 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5
  73. 2026-08-31 14:45 UTCEG score recompute
  74. 2026-08-31 14:45 UTCVendor advisory
  75. 2026-08-31 14:45 UTCGHSA enrichmentGHSA-p3x5-f8vr-q28x · GitHub severity HIGH · GitHub CVSS 7.5

Frequently asked(5)

What is CVE-2026-48863?
CVE-2026-48863 is a high-severity vulnerability; its CVE record was published on July 16, 2026. A flaw was found in libsolv. A stack-based buffer overflow vulnerability exists in the PGP verification component due to incorrect length handling when copying EdDSA 's' MPI into a stack buffer. A remote attacker could craft a malicious Ed25519 PGP signature with mismatched MPI lengths. Processing…
When was CVE-2026-48863 made public?
CVE-2026-48863 was made public on May 26, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on July 16, 2026. EchelonGraph's copy of the record carries a last-modified date of September 1, 2026; the record at its source may have been updated since.
Is CVE-2026-48863 actively exploited?
CVE-2026-48863 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (57th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-48863?
CVE-2026-48863 has a CVSS base score of 7.5 (the CNA's own assessment, by redhat; NVD's own analysis pending).
How do I remediate CVE-2026-48863?
A fix for CVE-2026-48863 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-48863 are linked in the Vendor Advisories panel on this page.

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