CVE-2026-100310

HIGHPre-NVD 7.07.0
EchelonGraph scoreMEDIUM confidence

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

Score 7.0 from GitHub Security Advisory (severity: HIGH) published 2026-09-25. A secondary CVSS source baseline 7.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated

Also known asEUVD-2026-87314 (ENISA EUVD) · GHSA-rxpm-xfjv-mq65 (GitHub Security Advisories)Source: ENISA EUVD

7.0EG
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: 0.1%CVSS: 7.0Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

GNU libextractor before 1.16 loads plugins from an untrusted search path specified by the LIBEXTRACTOR_PREFIX environment variable without proper privilege checks. A local attacker can exploit this by setting LIBEXTRACTOR_PREFIX to a directory containing a malicious plugin that executes arbitrary code with elevated privileges when loaded by a setuid or setgid program.

CVSS v3
7.0
EG Score
7.0HIGHmedium confidence
EG Risk
48
EG Risk 48/100

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)
Severity70% × 45%
Impact severity (EG Severity): CVSS 7.0 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, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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
0.1%
EPSS %ILE
3rd
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 (7.0): severity, escalated by confirmed exploitation. This CVE's 7.0 is its impact severity (EG Severity), not escalated.

EG Severity
7.0 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). 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, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 14 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, Track* at medium and Attend at high mission impact.

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 no (CISA Vulnrichment) · Technical impact total (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; 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 total (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 25, 2026

Last Modified

September 30, 2026

Advisory Details (4)

Auto-updated Sep 25, 2026
Patch available.
Web page

GNU libextractor before 1.16 Privilege Escalation via LIBEXTRACTOR_PREFIX | Advisories | VulnCheck

https://www.vulncheck.com/advisories/gnu-libextractor-before-1.16-privilege-escalation-via-libextractor-prefix
Web page

Libextractor - GNU Project - Free Software Foundation

https://www.gnu.org/software/libextractor/
Web page

GitHub - Haitam-lazaar/libextractor-privesc: PoC for a Local Privilege Escalation (LPE) in GNU libextractor ≤ 1.15. Exploits an untrusted search path via the LIBEXTRACTOR_PREFIX environment variable. Allows unprivileged users to execute arbitrary code as root when a setuid binary links against the library. · GitHub

https://github.com/Haitam-lazaar/libextractor-privesc

Vendor Advisories for CVE-2026-100310(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
libextractor1:1.11-7 ... 1:1.19-2 (16 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libextractor1:1.13-10 ... 1:1.19-2 (6 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libextractor1:1.13-10, 1:1.13-8, 1:1.13-9
  • every version up to 1:1.17-1: fixed in 1:1.17-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 64× 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 102 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 2 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  5. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  6. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-10-25 21:40 UTCEG score recompute
  9. 2026-10-25 21:40 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  10. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-10-25 15:58 UTCEG score recompute
  12. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-18 05:11 UTCEG score recompute
  20. 2026-10-17 20:22 UTCEG score recompute
  21. 2026-10-17 20:22 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  22. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
Show 75 more
  1. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-10-12 16:42 UTCEG score recompute
  3. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  4. 2026-10-11 19:42 UTCEG score recompute
  5. 2026-10-11 19:42 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  6. 2026-10-11 18:29 UTCEG score recompute
  7. 2026-10-11 15:03 UTCEG score recompute
  8. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-10-11 07:13 UTCEG score recompute
  10. 2026-10-11 07:13 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  11. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-10 18:44 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  13. 2026-10-10 06:18 UTCEG score recompute
  14. 2026-10-10 06:17 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  15. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-09 17:50 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  17. 2026-10-09 05:23 UTCEG score recompute
  18. 2026-10-09 05:23 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  19. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-10-08 16:55 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  21. 2026-10-08 00:27 UTCEG score recompute
  22. 2026-10-08 00:27 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  23. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  24. 2026-10-07 11:58 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  25. 2026-10-06 23:27 UTCEG score recompute
  26. 2026-10-06 23:27 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  27. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  28. 2026-10-06 11:00 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  29. 2026-10-05 22:33 UTCEG score recompute
  30. 2026-10-05 22:33 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  31. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  32. 2026-10-05 10:06 UTCEG score recompute
  33. 2026-10-05 10:06 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  34. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  35. 2026-10-04 21:38 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  36. 2026-10-04 09:11 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  37. 2026-10-03 20:44 UTCEG score recompute
  38. 2026-10-03 20:44 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  39. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  40. 2026-10-03 08:12 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  41. 2026-10-02 19:42 UTCEG score recompute
  42. 2026-10-02 19:42 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  43. 2026-10-02 07:14 UTCEG score recompute
  44. 2026-10-02 07:14 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  45. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  46. 2026-10-01 18:47 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  47. 2026-10-01 06:15 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  48. 2026-09-30 17:48 UTCEG score recompute
  49. 2026-09-30 17:48 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  50. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  51. 2026-09-30 13:57 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  52. 2026-09-30 01:30 UTCEG score recompute
  53. 2026-09-30 01:30 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  54. 2026-09-30 00:39 UTCEG score recompute
  55. 2026-09-30 00:39 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  56. 2026-09-29 16:46 UTCEG score recompute
  57. 2026-09-29 16:46 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  58. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  59. 2026-09-29 04:10 UTCEG score recompute
  60. 2026-09-29 04:10 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  61. 2026-09-28 15:43 UTCEG score recompute
  62. 2026-09-28 15:43 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  63. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  64. 2026-09-28 03:16 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  65. 2026-09-27 14:49 UTCEG score recompute
  66. 2026-09-27 14:48 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  67. 2026-09-27 02:22 UTCEG score recompute
  68. 2026-09-27 02:22 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  69. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  70. 2026-09-26 13:54 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  71. 2026-09-26 01:20 UTCEG score recompute
  72. 2026-09-26 01:20 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  73. 2026-09-26 00:37 UTCEG score recompute
  74. 2026-09-26 00:37 UTCGHSA enrichmentGHSA-rxpm-xfjv-mq65 · GitHub severity HIGH · GitHub CVSS 7.0
  75. 2026-09-25 20:37 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-100310?
CVE-2026-100310 is a high-severity vulnerability; its CVE record was published on September 25, 2026. GNU libextractor before 1.16 loads plugins from an untrusted search path specified by the LIBEXTRACTOR_PREFIX environment variable without proper privilege checks. A local attacker can exploit this by setting LIBEXTRACTOR_PREFIX to a directory containing a malicious plugin that executes arbitrary…
When was CVE-2026-100310 made public?
CVE-2026-100310 was made public on June 30, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on September 25, 2026. EchelonGraph's copy of the record carries a last-modified date of September 30, 2026; the record at its source may have been updated since.
Is CVE-2026-100310 actively exploited?
CVE-2026-100310 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-100310?
CVE-2026-100310 has a CVSS base score of 7.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-100310?
A fix for CVE-2026-100310 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-100310 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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